← Back to charts
Sourdough Starter: Fermento icon
APP STORE

Sourdough Starter: Fermento

Jonas Polenz · Food & Drink · United States store
NOT IN TOP 100 HERE
View on App Store ↗ Instagram card
Revenue a month, worldwide
Too small to estimate
Not enough chart or ratings data
New ratings
+2
in 14 days, 4 in total
Rating
5.0 of 5
2 ratings in this store
Countries it ranks in
0
was 0 on Oct 19, 2026

Revenue

Estimated from the grossing charts of Oct 26, 2026 in the 53 countries we track, and ratings growth on the App Store.

EST. REVENUE / MONTH · WORLDWIDE
Unranked
Not in any grossing chart, and too few ratings (4) to read its growth. Most apps at this stage earn little or nothing.
EST. LIFETIME DOWNLOADS
70 to 200
Estimated from ratings count
RATINGS
2
AVG RATING
5.00
PRICE
Free
AGE
44d
LAST UPDATE
18d ago
VERSION
2.0.3
SIZE
16 MB
AGE RATING
4+

Last 30 days

From our daily snapshots of every grossing chart and daily ratings counts.

DAYS IN A GROSSING CHART
7 / 30
COUNTRIES NOW
0 (was 0)
NEW RATINGS, LAST 6 DAYS
+0
EST. REVENUE A MONTH, DAILY · APP STORE EST
Show daily values
Sep 27, 2026not in a grossing chart
Sep 28, 2026not in a grossing chart
Sep 29, 2026not in a grossing chart
Sep 30, 2026not in a grossing chart
Oct 1, 2026not in a grossing chart
Oct 2, 2026not in a grossing chart
Oct 3, 2026not in a grossing chart
Oct 4, 2026not in a grossing chart
Oct 5, 2026not in a grossing chart
Oct 6, 2026not in a grossing chart
Oct 7, 2026not in a grossing chart
Oct 8, 2026not in a grossing chart
Oct 9, 2026not in a grossing chart
Oct 10, 2026$2K a month
Oct 11, 2026not in a grossing chart
Oct 12, 2026$2K a month
Oct 13, 2026$555 a month
Oct 14, 2026not in a grossing chart
Oct 15, 2026not in a grossing chart
Oct 16, 2026not in a grossing chart
Oct 17, 2026not in a grossing chart
Oct 18, 2026not in a grossing chart
Oct 19, 2026not in a grossing chart
Oct 20, 2026not in a grossing chart
Oct 21, 2026not in a grossing chart
Oct 22, 2026not in a grossing chart
Oct 23, 2026not in a grossing chart
Oct 24, 2026$619 a month
Oct 25, 2026$615 a month
Oct 26, 2026not in a grossing chart
The same estimate as the headline, saved every day. Best rank Sep 27, 2026: not ranked. Now: not ranked.
RATINGS IN THE CORE COUNTRIES, DAILY
Show daily values
Oct 12, 20262 ratings
Oct 13, 20262 ratings
Oct 14, 20262 ratings
Oct 15, 20263 ratings
Oct 17, 20263 ratings
Oct 18, 20263 ratings
Oct 20, 20264 ratings
Oct 22, 20264 ratings
Oct 23, 20264 ratings
Oct 24, 20264 ratings
Oct 25, 20264 ratings
Oct 26, 20264 ratings
2 on Oct 12, 2026, 4 on Oct 26, 2026. New ratings track new downloads, even outside the charts.

Money and momentum

Measured from the store, not estimated.

WHAT IT CHARGES
2 purchases listed
  • FermentoPlusMonthly$4.49
  • Fermento Yearly$35.99
Top in-app purchases as listed on the App Store, in local prices.
REVIEW MOMENTUM
Too few reviews
Fewer than 3 recent written reviews in this country.
RELEASE CADENCE
9 updates in 90 days
  • Typical gap between releases3 days
From the last 9 versions listed on the App Store.
RATING BREAKDOWN
2 ratings
5★100%
4★0%
3★0%
2★0%
1★0%

Store screenshots

ScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshotScreenshot

App Store ads

Apple Search Ads this app ran in the last 90 days, from Apple's public ad repository.

STATUS
Running now
FIRST SEEN
Sep 15, 2026
AD VARIATIONS
39
EU COUNTRIES
5
WHERE
Search results in AT, BE, DE, IE, NL. Formats: Icon + Asset Ad, Icon Ad. Last impression Oct 21, 2026.
AD TEXT
  • Starter calculator & recipes
  • Starter, Anstellgut & Kombucha
  • Starter feeding log & timer
  • Starter, kombucha, kraut&more
  • Anstellgut, Kombucha & Kraut
  • Kombucha, zuurkool en augurk
Ad creativeAd creativeAd creativeAd creativeAd creativeAd creative

Apple only publishes ads shown in the EU (EU Digital Services Act), with a 7 day delay. An app that advertises only outside the EU shows nothing here.

Growth research

Where this app is buying and earning its users. Each link opens pre filtered.

ASO keywords

Most repeated terms in the listing. Highlighted ones also appear in the title.

fermento11feed8starter7jar7jars6photo5day5plus5next feed5bake4sourdough starter3tell fermento3lock screen3jonaspolenz368 github3github fermento3fermento html3looks3instead3bubbie3next3reminders3tell3nothing3ratio3

What's new in 2.0.3

Twenty-two bakes, each as a timeline. A white loaf to learn the rhythm on, a rye-and-wheat mix that forgives, and twenty more — focaccia, baguettes, ciabatta, bagels, lye pretzels, cinnamon rolls. Each one arrives with its own timers and nudges, which you then bend to your own oven. Two are free. You can finally find the crumb read. It used to live on the bake review, which only exists on bake day. Now it is on your shelf, in the Breads tab and in the loaf gallery — wherever you are already looking at bread. And Bubbie keeps what she saw. The six marks used to be on screen once and then gone. They stay with the loaf now, so she can tell you what holds you back across every loaf she has read, instead of saying the same thing six times without noticing. Fixed: on some phones, opening Fermento from a feed reminder closed it on the spot — the one tap this whole app is built around. Sorry about that.

Released Sep 13, 2026. Current version shipped Oct 8, 2026.

Store description

Your sourdough starter is alive. Fermento treats it that way. Klaus — or whatever you name yours — has a face. Leave him too long and he looks hungry. Feed him and he beams. It sounds silly right up until you realise you haven't killed a starter in months. A PHOTO INSTEAD OF A GUESS Hold the jar up to the camera. Bubbie reads the bubbles, how far it climbed, the crust drying on the glass — six things a camera can genuinely judge, not ten invented ones. Then she says what it means for your next feed, and moves it. Photograph a cut loaf and she reads the crumb the same way. SIX JARS, ONE SHELF Sourdough starter, brine pickles, kombucha, kraut and kimchi, yogurt and kefir, ginger bug. Each gets its own character, rhythm and checklist. FROM FLOUR AND WATER Three day-by-day recipes raise a starter from scratch: the grams for each day, and what you should be seeing. Around day four it looks dead in every one of them — Fermento tells you that before you throw it out. REMINDERS THAT READ THE ROOM Free jars run on a fixed rhythm you choose. With Plus, tell Fermento how warm your kitchen is and it pulls the next feed forward on hot days, pushes it back when it's cold. Quiet hours are respected — nothing pings you at 3 a.m. Burp reminders for pickles, fizz checks for kombucha, a wake-up when a jar leaves the fridge. FEED BY THE SCALE Tell Fermento once what the empty jar weighs and every feed names the number to watch for instead of an amount to guess at. Your jar can hold a blend — 70 % wheat, 30 % wholegrain rye — and Bubbie says whether that ratio carries it to the next feed. WHEN SOMETHING LOOKS WRONG Grey liquid on top? White film? No rise? Photograph it, or pick what you see from a list. Bubbie explains what it actually is, and with Plus installs a real fix: a changed ratio, a shorter schedule, a set number of feeds. The jar stays in rescue mode until it's back on track. IT LEARNS YOUR STARTER Log a rise and Fermento remembers how long it took. The countdown to the peak is free and runs on your Lock Screen. With Plus it drops the rule of thumb and uses your jar's own measured curve instead. PLAN A BAKE BACKWARDS Say when the dough goes together and Fermento names the feed time and the ratio so the starter peaks exactly then. One plan a month is free. WHEN YOUR HANDS ARE FULL "Hey Siri, feed my starter in Fermento." A widget and a Control Centre button do the same in one tap. On bake day the step you're in counts down on the Lock Screen. EVERYTHING YOU DID, KEPT A calendar that fills itself and, with Plus, a photo timeline per jar and a monthly recap to share. Dough and brine calculators. Discard recipes so nothing goes in the bin. Your whole log exports as CSV — free, because it is your data. BADGES YOU EARN Twenty milestones and twenty-one outfits for your jars. None of them can be bought — they only come from actually looking after your ferments. WHAT LEAVES YOUR IPHONE No account, no sign-up, no ads, nothing sold on. Your jars, photos and history live on the device and sync through your own iCloud if you want them to. A photo sent for a reading is resized, stripped of its location, and stored nowhere — not on the server, not in a log. The weather heads-up is optional and sends a rounded-off region, never an address. Anonymous counts show where people get stuck; a switch in Settings turns them off. FERMENTO PLUS Unlimited jars, full history, the photo readings, the bake planner, rescue plans, temperature-aware reminders, photo timelines and the bake book. Free keeps two jars and 30 days of history. Fermento is a logbook, not a lab. It won't tell you whether something is safe to eat - when in doubt, throw it out. Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Use: https://jonaspolenz368.github.io/Fermento/terms.html Privacy Policy: https://jonaspolenz368.github.io/Fermento/privacy.html

See this store page in another country

Prices, ranks and reviews are per country. Revenue above is already worldwide.

More from Jonas Polenz

Walk the Odyssey | Stoic Steps
Health & Fitness
1 ratingsAnalyze →
Diemo | Finance and Budget
Finance
0 ratingsAnalyze →