Crumb vs Boule
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Crumb
This AI-powered companion analyzes your sourdough bread's fermentation, crumb structure, and hydration from a single photo. It provides personalized recommendations for future bakes and tracks your progress in a detailed baking journal. Features include proofing timers, starter health checks, and baking calculators.
- AI crumb analysis for fermentation and structure
- Proofing tracker with temperature-aware predictions
- Starter coach with feeding logs and health checks
- Baking journal to track bakes and progress
- Mixing-water calculator
- Recipe vault
Read full descriptionHide full description
Better Bread Through Better Feedback Crumb is your AI sourdough companion — from feeding your starter to reading the crumb. Snap a photo of any loaf and get instant feedback on fermentation, crumb structure, hydration, and overall bake quality, then track every loaf in a beautiful baking journal. AI Crumb Analysis • Analyze crumb openness and evenness • Evaluate fermentation — under, well, or over • Spot common baking issues • Get specific, next-bake recommendations • A tasting-note scorecard for every loaf Proofing Tracker • Time bulk fermentation and final proof • Temperature-aware "ready around" predictions • Cold-retard and out-of-the-fridge modes • Snap a photo mid-proof for an instant "is it ready?" read Starter Coach • Log feedings and see when your starter will peak • Photograph it for an AI health check • A from-scratch starter guide for beginners Baker's Tools • Mixing-water calculator to hit your target dough temp • Recipe vault for your formulas, hydration, and notes Your Baking Journal • A complete, photo-first history of your bakes • Track your score, best crumb, and streak over time • Nickname and favorite your proudest loaves • Ask the AI coach anything about a specific bake Built for Serious Home Bakers Whether you're baking your first country loaf or refining competition-quality sourdough, Crumb helps you understand and improve every bake. Download Crumb and turn every loaf into a learning opportunity. Terms: https://www.zencodex.io/apps/crumb/terms
Boule
Read full descriptionHide full description
Boule is a calm log for your sourdough starters that runs entirely on your device. Add a starter, set how often you feed it, and Boule counts down to the next feeding and reminds you when it is due. No account to create. Nothing leaves your device. - Track several starters, each with its own cadence and flour blend - Follow the in-app countdown to the next feeding and get a reminder when it is due - Scan the jar to read how much it has risen since the last feeding, on device - Work out flour, water, levain and salt in grams with baker percentages - Keep simple bake notes for each loaf you pull from the oven - A missed feeding softens into a rest state, never a guilt prompt Boule is built for the home baker tending one to three jars on the counter. Every feature works in airplane mode, so a flour-covered kitchen with no signal is no problem. Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vTDX9pxPOlUJl_skVUHPi99mAw0y2B2BYd_v1mJkoF3xW3rlOcW5KlYd4t93MMbbGhctSTnBTy7d_l6/pub Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is iOS requirement: Crumb at 17.0 against Boule's 26.0. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Crumb sells 4 in-app purchases, starting at $2.99 per month and Boule sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Crumb | Boule |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 days | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 20 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Zenmonkeys Digital LLC | Andrii Bashta |
In-app purchases
Crumb
- Crumb Pro$2.991 Month
- Crumb Pro (Annual)7 Days trial$19.991 Year
- 3 Scans$0.99
- 15 Scans$3.99
Boule
- Crumb Lifetime$9.99








