Support

Yeastie: Sourdough Starter Log

Keep your starter alive, and know the moment it is ready to bake with.

iOS 18.6 or later Devices iPhone, iPad Languages 9 Data stays on your device

The rise prediction

Yeastie estimates when your starter will peak, and that estimate moves around on purpose. It is not an average of your recent rises.

Two things decide how fast a starter rises, and both are taken into account:

How you fed it. A 1:1:1 feed peaks in roughly four hours; a 1:10:10 takes closer to ten. Rises fed the same way as the current one are used on their own whenever there are at least two of them.
How warm the kitchen is. Fermentation roughly halves in time for every 8 °C warmer. Every past rise is adjusted to today's temperature before it is compared with any other.

With no history at all, Yeastie falls back to the feed ratio alone. It gets sharper with every peak you record.

Kitchen temperature is optional but worth setting. Open a feeding and add it once — every later feeding carries the last reading forward, so you only correct it when the weather turns. Without it, the prediction still works, it just cannot see the seasons.

Why does it say “Peaked” when I never tapped anything?

That is the predicted peak. It means the estimated time has passed and your starter is probably at its highest. Tapping Peaked records the real time, which is what teaches Yeastie about this particular jar. Predictions stay rough until you record a few.

The prediction looks wrong

Almost always one of three things: a peak recorded long after the starter actually fell, a feeding logged at the wrong time, or a ratio change Yeastie has only seen once. Open the feeding from the History list and correct or clear it — the estimate recalculates immediately.

Statuses

Rising: Fed, climbing, not yet at the predicted peak.
Peaked — bake now: At or past the predicted peak, or within an hour of a peak you recorded.
Fed: Resting. The rise is over and the next feeding is not due yet.
Hungry: Past its feeding interval.
Neglected: More than twice the feeding interval. This is where the rescue comes in.

My starter looks dead

A starter left too long goes quiet and grows a layer of dark liquid on top. That liquid is hooch, and it means hunger, not death. Very few starters are genuinely beyond saving.

Open the starter and tap This one needs rescuing. Yeastie walks through the three-day revival: pour off the hooch, keep a small amount, feed 1:5:5 twice a day, keep it warm, and watch for a domed top. Starting a rescue moves the starter to a 12-hour reminder for the duration.

Recording a peak ends the rescue automatically — a peak is the proof it worked.

When it really is over: pink or orange streaks, or fuzzy mould in any colour. That is contamination rather than hunger, and the jar should be thrown out rather than rescued.

A reminder did not arrive

Reminders are scheduled on your device — nothing is sent from a server, so there is no delivery to chase. Work down this list:

Permission. Settings › Notifications › Yeastie must be allowed. The app asks the first time you switch a reminder on; if you declined then, iOS will not ask again.
The switch itself. Reminders are per starter, not global. Open the starter, tap Edit, and check Feeding reminders. Peak alerts are a separate switch.
A Focus mode may have held it back until later.
The schedule follows your last feeding. Feed six hours late and the next reminder moves six hours too — that is deliberate, not a missed alarm.

Yeastie also shows Settings › Notifications, where you can see at a glance whether iOS is allowing them.

Fixing mistakes

Wrong feeding time, or a feeding logged twice

Open the starter, find the entry under History, and tap it. You can change the time, the ratio, the note and the temperature, or delete the feeding outright.

A peak recorded too late

Open the same entry and tap Clear peak. Leaving a wrong peak in place drags the prediction with it.

Removing a starter

Edit › Delete Starter. Its feedings, rises and photos go with it, and this cannot be undone.

Free and Pro

Everything that keeps a starter alive is free and always will be: the feeding log, reminders, peak alerts, the rise timer and prediction, statuses, the rescue plan, the discard recipes, the baking-day flow and a widget.

Yeastie Pro adds breadth rather than unlocking the basics — unlimited starters, feeding history beyond the last two weeks, rise analytics, an unlimited photo timeline, custom ratios and bake schedules, the hydration calculator, every widget size, and iCloud sync.

Pro is available monthly, yearly or as a one-time purchase. Subscriptions renew until cancelled, and you cancel in Settings › your name › Subscriptions on your device, not in Yeastie.

I paid but Pro is not showing

Open Settings in Yeastie and tap Restore Purchases, with the same Apple Account you bought it on. Purchases restore on any device signed in to that account.

New phone, and iCloud sync

Yeastie stores everything on the device by default. Nothing leaves it, which also means nothing follows you to a new phone unless you turn sync on.

iCloud sync is a Pro feature and is off until you switch it on in Settings. It uses your own private iCloud storage; it is not a Yeastie account, and there is nothing to sign up for.

Yeastie opens its database once, when it launches. Turning sync on therefore takes effect the next time you open the app — close it fully and reopen. The app tells you this when you flip the switch.

Restoring an encrypted iPhone backup also carries your starters across.

Widgets and the Live Activity

The widget shows the starter that needs you most, with a button to log a feeding without opening the app. The small size is free; the medium, rectangular and circular sizes are part of Pro.

iOS decides how often a widget may refresh and can hold updates back to save battery, so a widget is occasionally a few minutes behind. Opening Yeastie always brings it up to date.

When a rise is under way, a Live Activity counts down to the predicted peak on the Lock Screen and in the Dynamic Island. It ends shortly after you record the peak.

Photos

You can attach one photo at feeding and one at peak. They are stored inside the app, at reduced size, and go to iCloud only if you have turned sync on. The free tier holds ten photos across all starters; Pro removes the limit.

Camera access is asked for only when you first choose to take a photo, and choosing from your library needs no permission at all.

Contact

Questions, bugs, or a starter behaving in a way the app did not predict — write, and include your iOS version and what you were doing. Replies usually come within a couple of days.

yeastie@frekvens.ai