My sourdough coach
Like a little pocket sourdough crumb coach. Take a picture of your crumb and learn how to improve it. Also has tools for baking and recipes.
Free
In-App Purchases
About
This AI-powered companion analyzes your sourdough bakes, providing feedback on fermentation, crumb structure, and hydration. It helps you track your progress, manage your starter, and offers tools for better bread-making.
✓AI crumb analysis for openness and evenness
✓Fermentation evaluation (under, well, over)
✓Proofing tracker with temperature-aware predictions
✓Starter health checks and feeding logs
✓Mixing-water calculator
✓Photo-first baking journal
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What's New in Crumb
1.5
June 28, 2026
What's new in 1.5: • Community — share your scored bakes to a public feed, see what other sourdough bakers are pulling from the oven, and like your favorites. • Choose a baker name to post under. • Report and block controls keep the feed friendly. • Lighter, faster photo uploads. • Stability improvements.
MoreSubscription plans
Crumb Pro
Crumb pro monthly.
$4.991 Month
2
In-App Purchases
$0.99
3 Scans
3 AI crumb reads.
User reviews
Developer apps
FAQ
What does Crumb analyze in my sourdough bakes?
Crumb analyzes crumb openness and evenness, evaluates fermentation levels (under, well, or over), and spots common baking issues. It provides specific recommendations for your next bake and a tasting-note scorecard for each loaf.
How does Crumb help with proofing?
Crumb's proofing tracker monitors bulk fermentation and final proof times. It offers temperature-aware 'ready around' predictions and supports cold-retard and out-of-the-fridge modes. You can also snap a photo mid-proof for an instant 'is it ready?' check.
Can Crumb help me manage my sourdough starter?
Yes, Crumb acts as a Starter Coach. You can log feedings to see when your starter will peak, photograph it for an AI health check, and access a guide for creating a starter from scratch.
What baking tools are included in Crumb?
Crumb includes a mixing-water calculator to help you achieve your target dough temperature. It also features a recipe vault where you can store your formulas, hydration percentages, and personal notes.
How does Crumb's baking journal work?
The baking journal provides a complete, photo-first history of all your bakes. You can track your scores, best crumb results, and baking streaks over time. You can also nickname and favorite your proudest loaves and ask the AI coach specific questions about any bake.
What are the subscription options for Crumb Pro?
Crumb Pro offers two subscription plans: a monthly option for $4.99 per month and an annual plan for $34.99 per year. The annual plan includes a 7-day free trial.
Is Crumb suitable for beginners?
Yes, Crumb is built for serious home bakers, from beginners to experienced individuals. It provides a from-scratch starter guide and helps users understand and improve every bake, making it valuable for all skill levels.
What devices does Crumb support?
Crumb is available on iPhone and iPad devices, allowing users to analyze their bakes and manage their baking journey across Apple's mobile platforms.