Landscape

What already exists for each planned subsystem, open source and proprietary, before the prototypes here go any deeper. 23 services surveyed across six subsystems, 9 of them labeled open source (7 strictly OSI-conformant; Tandoor carries a Commons Clause resale restriction and RecipeSage is AGPL for non-commercial use only, both noted per entry), and 7 flagged as replicate-as-OSS candidates: proprietary services whose best patterns are worth rebuilding openly rather than cloning their whole product.

The honest gap: fridge inventory, meal planning, recipe kits and calorie counting all have solid open source options. Diet and health programs mostly do not. Diet has one small self-hosted project against two polished proprietary planners; health programs has zero open source entries at all. That is exactly where the replicate-as-OSS flags cluster below.

OSS open source, license verified against its repository. proprietary closed source. replicate pattern worth an open equivalent. Sources are tiered A (license text / repository), B (independent analysis), C (vendor's own page).

Fridge inventory (open app)

Manual and barcode-tracked pantry/fridge stock with expiry nudges.

4 services · 2 open source · 2 replicate candidates

Name	OSS / license	Coverage	Gaps vs ideal	Replicate
Grocy	OSS MIT	Self-hosted web app for pantry, fridge and household stock: manual and barcode entry, expiry dates, chores and shopping list generation.	No values scoring or provenance linkage to what is actually in stock, and self-hosting is a real setup barrier for a non-technical household.	no
KitchenOwl	OSS AGPL-3.0	Self-hosted grocery list and recipe manager (Flask backend, Flutter frontend) with real-time shared shopping lists and expense tracking.	Lighter on dedicated expiry-date tracking than Grocy, and again requires self-hosting to run.	no
NoWaste	proprietary	Proprietary mobile app for food inventory: barcode scanning, expiry alerts, cross-device account sync, and recipe suggestions for items about to expire.	Cloud account required, closed data model, no values scoring or provenance, and free tier is capped at six lists.	replicate
Fridgely	proprietary	Proprietary mobile app that auto-adds items by photographing a grocery receipt or scanning a barcode, then tracks expiry and suggests recipes.	Small independent developer, freemium in-app purchases, no values scoring or provenance, single-purpose with no meal-plan or diet integration.	replicate

Grocy

OSS

MIT

Self-hosted web app for pantry, fridge and household stock: manual and barcode entry, expiry dates, chores and shopping list generation.

Gap: No values scoring or provenance linkage to what is actually in stock, and self-hosting is a real setup barrier for a non-technical household.

Already MIT-licensed and actively maintained; extend or embed rather than rebuild from scratch.

GitHub / grocy [A] accessed 2026-08-24
Grocy [C] accessed 2026-08-24

KitchenOwl

OSS

AGPL-3.0

Self-hosted grocery list and recipe manager (Flask backend, Flutter frontend) with real-time shared shopping lists and expense tracking.

Gap: Lighter on dedicated expiry-date tracking than Grocy, and again requires self-hosting to run.

Already open source (AGPL-3.0); its lean Flutter UI is worth studying, not re-implementing from scratch.

GitHub / TomBursch [A] accessed 2026-08-24
KitchenOwl [C] accessed 2026-08-24

NoWaste

proprietary

Proprietary mobile app for food inventory: barcode scanning, expiry alerts, cross-device account sync, and recipe suggestions for items about to expire.

Gap: Cloud account required, closed data model, no values scoring or provenance, and free tier is capped at six lists.

replicate The account-synced, expiry-first workflow is a solid pattern worth an open equivalent; the closed cloud data model is the gap to fix, not the UX.

NoWaste [C] accessed 2026-08-24
Fango [B] 2026

Fridgely

proprietary

Proprietary mobile app that auto-adds items by photographing a grocery receipt or scanning a barcode, then tracks expiry and suggests recipes.

Gap: Small independent developer, freemium in-app purchases, no values scoring or provenance, single-purpose with no meal-plan or diet integration.

replicate Receipt-photo auto-add is a real friction reducer over Grocy/KitchenOwl's manual or barcode-only entry; worth replicating openly.

Fridgely [C] accessed 2026-08-24

Meal planning (open app)

Week planners that turn a recipe collection into a shopping list.

4 services · 2 open source · 1 replicate candidates

Name	OSS / license	Coverage	Gaps vs ideal	Replicate
Mealie	OSS AGPL-3.0	Self-hosted recipe manager and meal planner: import recipes by URL, build a week plan, and generate a shopping list from it.	No values scoring, provenance, or diet-profile awareness of what gets planned; self-hosting required.	no
Tandoor Recipes	OSS AGPL-3.0 with Commons Clause (no resale)	Self-hosted recipe manager, meal planner and shopping list builder with strong recipe-scraping import from external sites.	The Commons Clause forbids selling a hosted version, so it is source-available rather than strictly OSI open source, plus the usual lack of values scoring and provenance.	no
Paprika Recipe Manager	proprietary	Proprietary recipe organizer, meal planner and grocery list app sold per-platform (iOS, Android, Mac, Windows) with cloud sync.	Paid per platform, closed sync, no values scoring or provenance, no diet-profile sharing across apps.	no
Samsung Food (formerly Whisk)	proprietary	Proprietary AI-driven recipe discovery and meal-planning platform (160,000+ recipes) with grocery-integration auto-shopping-lists and Samsung Health sync.	Owned by Samsung with a hardware-ecosystem lock-in angle, closed data, no values scoring or provenance, no independent diet-profile contract.	replicate

Mealie

OSS

AGPL-3.0

Self-hosted recipe manager and meal planner: import recipes by URL, build a week plan, and generate a shopping list from it.

Gap: No values scoring, provenance, or diet-profile awareness of what gets planned; self-hosting required.

Already open source; contribute upstream or extend rather than rebuild.

GitHub / mealie-recipes [A] accessed 2026-08-24
Mealie [C] accessed 2026-08-24

Tandoor Recipes

OSS

AGPL-3.0 with Commons Clause (no resale)

Self-hosted recipe manager, meal planner and shopping list builder with strong recipe-scraping import from external sites.

Gap: The Commons Clause forbids selling a hosted version, so it is source-available rather than strictly OSI open source, plus the usual lack of values scoring and provenance.

Code is already public and modifiable for non-commercial use; the resale restriction is a licensing nuance to note, not a gap to replicate around.

GitHub / TandoorRecipes [A] accessed 2026-08-24
TandoorRecipes [A] accessed 2026-08-24

Paprika Recipe Manager

proprietary

Proprietary recipe organizer, meal planner and grocery list app sold per-platform (iOS, Android, Mac, Windows) with cloud sync.

Gap: Paid per platform, closed sync, no values scoring or provenance, no diet-profile sharing across apps.

Mealie and Tandoor already cover the same web-import-plus-meal-plan pattern openly; no distinct pattern here worth separately replicating.

Hindsight Labs / Paprika [C] accessed 2026-08-24

Samsung Food (formerly Whisk)

proprietary

Proprietary AI-driven recipe discovery and meal-planning platform (160,000+ recipes) with grocery-integration auto-shopping-lists and Samsung Health sync.

Gap: Owned by Samsung with a hardware-ecosystem lock-in angle, closed data, no values scoring or provenance, no independent diet-profile contract.

replicate AI-personalized plans plus automatic grocery-integration shopping lists is a genuinely novel pattern not yet matched openly; worth an open, privacy-respecting equivalent.

Samsung Food [C] accessed 2026-08-24
SamMobile [B] 2023

Recipe kits (planned)

HelloFresh-style portioned, timed recipe kits, both delivery-commerce and open formats.

4 services · 2 open source · 1 replicate candidates

Name	OSS / license	Coverage	Gaps vs ideal	Replicate
HelloFresh	proprietary	Proprietary weekly meal-kit delivery: pre-portioned ingredients matched to a printed recipe card with exact timing, available in Austria.	Commerce-locked to their own delivery and pricing, no values scoring or provenance beyond their own sustainability marketing, no diet-profile portability.	replicate
Marley Spoon	proprietary	Proprietary weekly meal-kit delivery service operating in Austria, with ready-made meals and a marketplace of pantry add-ons alongside recipe kits.	Same commerce lock-in as HelloFresh; no values scoring, provenance, or diet-profile sharing.	no
Cooklang / cookcli	OSS MIT	Open, human-readable recipe markup language plus a CLI and embedded web server (cookcli) for parsing recipes into structured, machine-readable kit steps.	A markup format and toolchain, not a consumer meal-kit app by itself; needs a UI layer for a household to use it like HelloFresh.	no
RecipeSage	OSS AGPL-3.0 (non-commercial; commercial license available)	Collaborative, self-hostable recipe keeper, meal planner and shopping-list organizer as a PWA, with recipe sharing between accounts.	AGPL applies to non-commercial use only, commercial use needs a separate paid license from the maintainer; no values scoring or provenance.	no

HelloFresh

proprietary

Proprietary weekly meal-kit delivery: pre-portioned ingredients matched to a printed recipe card with exact timing, available in Austria.

Gap: Commerce-locked to their own delivery and pricing, no values scoring or provenance beyond their own sustainability marketing, no diet-profile portability.

replicate The structured kit format itself (portion-exact ingredients plus a timed step card) is the benchmark UX pattern worth replicating as an open, printable format decoupled from their delivery commerce.

HelloFresh Austria [C] accessed 2026-08-24

Marley Spoon

proprietary

Proprietary weekly meal-kit delivery service operating in Austria, with ready-made meals and a marketplace of pantry add-ons alongside recipe kits.

Gap: Same commerce lock-in as HelloFresh; no values scoring, provenance, or diet-profile sharing.

Same kit pattern as HelloFresh with no separately distinct feature; the HelloFresh entry already covers the replicate case for this category.

Marley Spoon Austria [C] accessed 2026-08-24

Cooklang / cookcli

OSS

MIT

Open, human-readable recipe markup language plus a CLI and embedded web server (cookcli) for parsing recipes into structured, machine-readable kit steps.

Gap: A markup format and toolchain, not a consumer meal-kit app by itself; needs a UI layer for a household to use it like HelloFresh.

Already open (MIT); its markup language is itself the reusable, already-free pattern for machine-readable recipe kit steps.

GitHub / cooklang [A] accessed 2026-08-24
Cooklang [C] accessed 2026-08-24

RecipeSage

OSS

AGPL-3.0 (non-commercial; commercial license available)

Collaborative, self-hostable recipe keeper, meal planner and shopping-list organizer as a PWA, with recipe sharing between accounts.

Gap: AGPL applies to non-commercial use only, commercial use needs a separate paid license from the maintainer; no values scoring or provenance.

Already open for non-commercial use; the collaborative recipe-plus-shopping-list pattern is usable as-is.

GitHub / julianpoy [A] accessed 2026-08-24
julianpoy / RecipeSage README [A] accessed 2026-08-24

Calorie counter (open app)

Manual calorie and nutrient logs with daily totals.

5 services · 2 open source · 1 replicate candidates

Name	OSS / license	Coverage	Gaps vs ideal	Replicate
OpenNutriTracker	OSS GPL-3.0	Free, open source Flutter calorie and macro tracker focused on simplicity and privacy: no ads, no account required, no data collection.	Manual and barcode logging only, no values scoring or provenance link to what is being eaten, food database smaller than the commercial giants.	no
Waistline	OSS GPL-3.0	Libre Android calorie counter and weight tracker built with Cordova, backed by the Open Food Facts database, no ads or in-app purchases.	Android only, no values scoring or provenance beyond what Open Food Facts itself exposes, smaller maintainer community than the OSS recipe apps.	no
MyFitnessPal	proprietary	Proprietary nutrition tracker with a 20-million-item food database, photo-based meal scanning, and integrations across 40+ fitness apps and devices.	Closed data, subscription-gated features, no values scoring or provenance, no diet-profile contract shared with other apps.	no
Cronometer	proprietary	Proprietary nutrition tracker with deep micronutrient analysis, tracking up to 95 nutrients and compounds, plus a professional tier for clinicians.	Closed data, paid Gold tier for full functionality, no values scoring or provenance link.	replicate
Yazio	proprietary	Proprietary food, fitness and fasting tracker: AI-assisted food logging, macro tracking, intermittent fasting timers, and activity sync.	Closed data, subscription-gated, no values scoring or provenance, no diet-profile contract shared across apps.	no

OpenNutriTracker

OSS

GPL-3.0

Free, open source Flutter calorie and macro tracker focused on simplicity and privacy: no ads, no account required, no data collection.

Gap: Manual and barcode logging only, no values scoring or provenance link to what is being eaten, food database smaller than the commercial giants.

Already open source; its privacy-first, no-account design is the model to build on directly.

GitHub / simonoppowa [A] accessed 2026-08-24
Apple App Store [C] accessed 2026-08-24

Waistline

OSS

GPL-3.0

Libre Android calorie counter and weight tracker built with Cordova, backed by the Open Food Facts database, no ads or in-app purchases.

Gap: Android only, no values scoring or provenance beyond what Open Food Facts itself exposes, smaller maintainer community than the OSS recipe apps.

Already open source and Open Food Facts-backed; adopt or extend rather than rebuild.

GitHub / davidhealey [A] accessed 2026-08-24

MyFitnessPal

proprietary

Proprietary nutrition tracker with a 20-million-item food database, photo-based meal scanning, and integrations across 40+ fitness apps and devices.

Gap: Closed data, subscription-gated features, no values scoring or provenance, no diet-profile contract shared with other apps.

OpenNutriTracker and waistline already cover manual and barcode logging openly; the differentiator here is a licensed food database, a data problem rather than a UX pattern worth replicating.

MyFitnessPal, Inc. [C] accessed 2026-08-24

Cronometer

proprietary

Proprietary nutrition tracker with deep micronutrient analysis, tracking up to 95 nutrients and compounds, plus a professional tier for clinicians.

Gap: Closed data, paid Gold tier for full functionality, no values scoring or provenance link.

replicate Micronutrient-depth tracking is a pattern worth replicating; the OSS trackers here are calorie/macro-focused and comparatively thin on micronutrients.

Cronometer [C] accessed 2026-08-24

Yazio

proprietary

Proprietary food, fitness and fasting tracker: AI-assisted food logging, macro tracking, intermittent fasting timers, and activity sync.

Gap: Closed data, subscription-gated, no values scoring or provenance, no diet-profile contract shared across apps.

The fasting-timer feature is a nice-to-have but not differentiated enough from the existing OSS trackers and Cronometer's coverage to prioritize replicating.

Yazio [C] accessed 2026-08-24

Diet (open app)

A diet profile (style, exclusions, condition) that other apps could read.

3 services · 1 open source · 1 replicate candidates

Name	OSS / license	Coverage	Gaps vs ideal	Replicate
PANTS (Price and Nutrition Tracking System)	OSS Apache-2.0	Self-hosted, open source nutrition tracker and analysis tool for ingredients and recipes, usable for average-meal diet planning.	Small single-maintainer project with a technical setup barrier, no values scoring or provenance, no polished diet-profile UI comparable to the proprietary planners.	no
PlateJoy	proprietary	Proprietary personalized meal-planning subscription for specific health conditions (diabetes, PCOS, gluten intolerance) built from a ~50-field lifestyle survey, with nutritionist consults.	Closed, subscription-priced, no values scoring or provenance, and the diet profile it builds is locked to their own meal plans rather than a shared contract other apps can read.	replicate
Eat This Much	proprietary	Proprietary automatic meal-plan generator matched to diet type (keto, vegan, paleo, Mediterranean), calorie and macro targets, with grocery-list and Instacart integration.	Closed data, subscription tiers, no values scoring or provenance, no portable diet-profile contract.	no

PANTS (Price and Nutrition Tracking System)

OSS

Apache-2.0

Self-hosted, open source nutrition tracker and analysis tool for ingredients and recipes, usable for average-meal diet planning.

Gap: Small single-maintainer project with a technical setup barrier, no values scoring or provenance, no polished diet-profile UI comparable to the proprietary planners.

Already open source (Apache-2.0); worth adopting or forking directly given how thin the OSS options are in this subsystem.

GitHub / dylanleigh [A] accessed 2026-08-24

PlateJoy

proprietary

Proprietary personalized meal-planning subscription for specific health conditions (diabetes, PCOS, gluten intolerance) built from a ~50-field lifestyle survey, with nutritionist consults.

Gap: Closed, subscription-priced, no values scoring or provenance, and the diet profile it builds is locked to their own meal plans rather than a shared contract other apps can read.

replicate Condition-aware diet profiling maps directly onto the diet-profile contract this ecosystem needs shared across apps; no OSS equivalent exists at this depth, so this is the strongest replicate case in the subsystem.

PlateJoy, Inc. [C] accessed 2026-08-24

Eat This Much

proprietary

Proprietary automatic meal-plan generator matched to diet type (keto, vegan, paleo, Mediterranean), calorie and macro targets, with grocery-list and Instacart integration.

Gap: Closed data, subscription tiers, no values scoring or provenance, no portable diet-profile contract.

Same macro-and-diet-type auto-plan pattern as PlateJoy; the PlateJoy entry already covers the replicate case for this subsystem.

Eat This Much [C] accessed 2026-08-24

Health programs (open app)

"Let food be medicine" style behavior-change and clinical programs.

3 services · 0 open source · 1 replicate candidates

Name	OSS / license	Coverage	Gaps vs ideal	Replicate
Noom	proprietary	Proprietary behavior-change weight and health management program combining a CBT-based curriculum with full-time human coaches, now extended to diabetes and menopause.	Closed curriculum, paid coaching model, no values scoring or provenance, no OSS equivalent exists in this subsystem at all.	replicate
ZOE	proprietary	Proprietary personalized nutrition program using at-home lab testing (continuous glucose monitor, stool microbiome sequencing, blood-fat response) to score foods 0-100 for an individual.	Depends on paid lab testing and a proprietary algorithm trained on 300,000+ profiles; closed, no values scoring, no OSS equivalent possible without the underlying research dataset.	no
Virta Health	proprietary	Proprietary clinically supervised type 2 diabetes reversal program combining a carbohydrate-restricted nutrition protocol with continuous remote care from physicians.	Requires licensed medical supervision and works with health plans/employers rather than individuals directly; closed, no OSS equivalent, no values scoring.	no

Noom

proprietary

Proprietary behavior-change weight and health management program combining a CBT-based curriculum with full-time human coaches, now extended to diabetes and menopause.

Gap: Closed curriculum, paid coaching model, no values scoring or provenance, no OSS equivalent exists in this subsystem at all.

replicate The CBT-based behavior-change curriculum structure is the strongest pattern here and there is no OSS equivalent; replicate the coaching-content structure, not the paid-human-coach labor model.

Noom [C] accessed 2026-08-24

ZOE

proprietary

Proprietary personalized nutrition program using at-home lab testing (continuous glucose monitor, stool microbiome sequencing, blood-fat response) to score foods 0-100 for an individual.

Gap: Depends on paid lab testing and a proprietary algorithm trained on 300,000+ profiles; closed, no values scoring, no OSS equivalent possible without the underlying research dataset.

Depends on proprietary lab testing and a predictive algorithm trained on a large private dataset; this is a data and testing moat, not a software UX pattern that can be extracted and replicated.

ZOE [C] accessed 2026-08-24

Virta Health

proprietary

Proprietary clinically supervised type 2 diabetes reversal program combining a carbohydrate-restricted nutrition protocol with continuous remote care from physicians.

Gap: Requires licensed medical supervision and works with health plans/employers rather than individuals directly; closed, no OSS equivalent, no values scoring.

A clinically supervised medical-care model needs licensed clinicians to operate; not a software pattern this ecosystem can extract and open-source.

Virta Health [C] accessed 2026-08-24