# Tankwell: Water Change Timer — One tap. Every tank on time.

> One tap. Every tank on time. (iPhone/iPad app by 永 张.)

- Source: https://appshunter.io/ios/app/tankwell-water-change-timer/id6787042823 (this page in markdown: same URL + `.md`)
- Developer: [永 张](https://appshunter.io/developer/1806535769)
- Category: Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 26.0 · 1 MB
- Languages: American English
- Released: 2026-07-23
- Data updated: 2026-08-17
- User reviews in markdown: https://appshunter.io/ios/app/tankwell-water-change-timer/id6787042823/reviews.md

## What is Tankwell?

Tankwell is a fast, fully offline aquarium water change reminder for anyone keeping one tank or a whole fish room. No accounts, no cloud sync, no clutter — just a clean list of your tanks and exactly when each one needs attention.

Most tank-tracking apps bury the one thing you actually open them for — "is it time yet?" — under logs, journals, and social feeds. Tankwell strips that away: add a tank in two taps, set a water-change interval, and get a local reminder when it's due. Logging a completed change takes one tap and instantly resets the countdown.

WHY TANKWELL
• One-tap logging — no forms, no friction
• Fully offline — your tank data never leaves your phone
• No account, no sign-in, no ads
• Built for aquarists managing multiple tanks at once

INCLUDED
• Track up to 2 tanks with water-change reminders
• One-tap logging with automatic countdown reset
• Local notifications so you never forget
• Full change history per tank

TANKWELL PRO (one-time purchase)
• Unlimited tanks
• Filter change, water test, and fertilizer dosing reminders
• Custom reminder time per task
• Export full history as CSV

Whether you run a single betta bowl or a fish room full of reef and cichlid tanks, Tankwell keeps every water change on schedule without ever asking for your data.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Tankwell Pro | $4.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-08-12

Fixed minor issues and improved overall stability.

### 1.0.1 — 2026-08-11

Fixed minor issues and improved overall stability.

### 1.0 — 2026-07-23

No release notes.

## More apps by 永 张

- [PhotoBridge: NAS & S3 Backup](https://appshunter.io/ios/app/photobridge-nas-and-s3-backup/id6754593211)
- [SipNote: Caffeine Tracker](https://appshunter.io/ios/app/sipnote-caffeine-tracker/id6759808330)
- [LoopSnap: GIF & Sticker Maker](https://appshunter.io/ios/app/loopsnap-gif-and-sticker-maker/id6763897111)
- [IDKit: Passport & ID Photos](https://appshunter.io/ios/app/idkit-passport-and-id-photos/id6769530845)
- [ShotKit: Screenshot Studio](https://appshunter.io/ios/app/shotkit-screenshot-studio/id6777430919)
- [NearBeam: Local File Transfer](https://appshunter.io/ios/app/nearbeam-local-file-transfer/id6777431459)

All apps by 永 张: https://appshunter.io/developer/1806535769

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*