Support

Email [email protected] and a real person will reply. Including your iOS version and what you were doing when it went wrong gets you a faster answer.

Common questions

Do I need an account?

No. Aquafern has no sign-up and no password. If you're signed in to iCloud on your device, your log backs up and syncs automatically using your own Apple Account.

My second device isn't showing my tanks.

Both devices need to be signed in to the same Apple Account with iCloud Drive turned on (Settings → your name → iCloud). Open Aquafern on both and give it a minute on Wi-Fi — the first sync of a long log can take a while. Settings inside Aquafern shows whether it's syncing or saving locally only.

If I don't subscribe, do I lose my old readings?

No. Everything you log is kept and backed up whether or not you subscribe. The free tier charts the last 30 days; older readings are still there, still synced, and appear again the moment you subscribe. Cancelling never deletes anything.

How do I restore a subscription on a new phone?

Open the Pro screen and tap Restore in the top right. As long as you're signed in to the same Apple Account that bought it, it comes straight back.

How do I cancel?

Subscriptions are managed by Apple, not by us: open the Settings app, tap your name, then Subscriptions. Cancel at least 24 hours before the renewal date. The app also has a shortcut under Settings → Subscription.

Can I use °F, gallons, or specific gravity?

Yes. Volume is set once in Settings. Each parameter has its own unit, set per tank: tap the unit next to the number while logging, or open the tank → Parameters and pick one there. Readings are stored in a single canonical unit and converted for display, so changing units never alters your history.

The target range isn't right for my fish.

The defaults are conservative middles for each tank type — a discus keeper and a Tanganyikan keeper want very different pH targets and both are right. Open the tank → Parameters → tap a parameter and set your own range. (Custom targets are a Pro feature.)

I tested something but the reading didn't save.

Skipping a parameter records nothing for it — deliberately, because "didn't test" and "tested and got zero" are different facts and mixing them would wreck the charts. If you meant zero, tap the 0 chip rather than Skip.

Where did my reminders go?

Reminders need notification permission (Settings → Aquafern → Notifications) and are part of Pro. Each tank uses its own water change and test interval, which you set when editing the tank; the time of day is in Aquafern's own Settings.

Can I get my data out?

Yes, and without asking us. Tank → Export gives you a CSV for spreadsheets (one row per test, one column per parameter) and a printable PDF report. It's your data; there's no lock-in.

Is there an Android version?

Not currently.

Something's broken

Aquafern is meant to be boring and correct. If it crashed, lost an entry, or charted something that looks wrong, that's a bug worth reporting — email [email protected] with what you saw and your app version (Settings → About → Version).