# TankDiary: Aquarium Tracker — Water Parameter & Tank Log

> Water Parameter & Tank Log (iPhone/iPad app by TOBY M BERGER.)

- Source: https://appshunter.io/ios/app/tankdiary-aquarium-tracker/id6788005172 (this page in markdown: same URL + `.md`)
- Developer: [TOBY M BERGER](https://appshunter.io/developer/6776950197)
- Category: Lifestyle, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English, German (Germany), Japanese, Brazilian Portuguese
- Released: 2026-07-11
- Data updated: 2026-07-27
- User reviews in markdown: https://appshunter.io/ios/app/tankdiary-aquarium-tracker/id6788005172/reviews.md

## What is TankDiary?

The aquarium logbook that respects your wallet: pay once, own it forever. No subscription, no account, no ads — your tank data stays on your phone.

New tank? TankDiary reads your ammonia, nitrite, and nitrate tests and tells you exactly which stage of the nitrogen cycle you're in — and when it's finally safe to add fish.

KNOW WHEN YOUR TANK IS READY
Cycling a new tank is where most beginners lose fish. Log your ammonia, nitrite, and nitrate as you go and TankDiary plots the classic cycle curve, names the stage you're in, and tells you the one thing to do next. It won't call your tank cycled until it has actually watched it process waste — no false all-clear.

TRACK WHAT MATTERS
Log temperature, pH, ammonia, nitrite, nitrate, GH, KH, TDS and more in one quick sheet. Color-coded safe ranges tell you at a glance if something's drifting. Interactive charts show trends over weeks or years — with the safe zone drawn right on the graph and touch-to-read values on every point.

KNOW WHEN SOMETHING'S WRONG
The home screen flags out-of-range parameters and overdue maintenance across all your tanks the moment you open the app — no drilling in required.

NEVER MISS A WATER CHANGE
Set schedules for water changes, filter cleans, dosing, and trimming, with reliable local reminders at the time you choose. The built-in water change calculator tells you how much to pull, how much conditioner to add, and — the part nobody else answers — what the change will actually do to your nitrate, including the floor set by nitrate in your own tap water.

YOUR WHOLE TANK, REMEMBERED
Livestock list with photos — fish, inverts, plants — searchable by species. A photo journal for milestones, rescapes, and diary notes, with full-screen pinch-to-zoom. Everything works offline.

HONEST PRICING
Free forever: 1 tank, working reminders, 30 days of history, the full cycle tracker, and the calculator. TankDiary Pro unlocks unlimited tanks and full history as a one-time purchase. There's a cheap yearly option too, but we think you'll prefer to just own it.

No account. No cloud lock-in. No selling your data — there's nothing to sell; it never leaves your device.

Made by a hobbyist who got tired of spreadsheet water logs.

Privacy Policy: https://tankdiary.com/privacy.html
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| TankDiary Pro — Yearly | $9.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| TankDiary Pro — Lifetime | $24.99 | one-time |



## Version history (last 3 releases)

### 1.3.0 — 2026-07-23

Setting up a new tank? TankDiary now tracks the nitrogen cycle for you.

• Nitrogen cycle tracker — log ammonia, nitrite and nitrate as you normally would, and TankDiary plots the classic cycle curve, names the stage you're in, and tells you the one thing to do next. It won't declare your tank cycled until it has actually watched it process waste, so you never get a false all-clear.

• Water change calculator — how much water to pull, how much conditioner to add, and what the change will really do to your nitrate, including the floor set by nitrate in your own tap water. Log the change straight from the calculator.

• Clearer charts — the safe range is now drawn over the graph instead of behind it, so you can actually see when a reading is drifting out of it.

• Fixed: tanks could report "Last water change: Never" even when one had been recorded.

Both new features are free — no Pro required.

### 1.2.0 — 2026-07-22

TankDiary 1.2 is the biggest quality update yet:

• Needs Attention — your home screen now flags out-of-range parameters and overdue maintenance across every tank, so you know if something's wrong at a glance.
• Interactive charts — touch and drag any graph to read the exact value and date of every test.
• Full-screen photos — tap any journal, tank, or livestock photo to view it full screen with pinch-to-zoom.
• Search — filter your livestock by species or name, and search your journal entries.
• New-to-TankDiary tour, plus an optional sample tank so you can explore with real-looking data before adding your own.
• Settings now warns you if notifications are turned off, so reminders never silently fail.
• Polished paywall, clearer restore-purchases feedback, and lots of small fixes.

Free stays free: 1 tank, working reminders, 30 days of history, CSV export, and backups — no account, no ads, nothing leaves your device.

### 1.1.0 — 2026-07-11

No release notes.

## More apps by TOBY M BERGER

- [CommitAI - Commitment Graphics](https://appshunter.io/ios/app/commitai-commitment-graphics/id6776950195)
- [KoiLog: Koi Pond Tracker](https://appshunter.io/ios/app/koilog-koi-pond-tracker/id6788127388)
- [ReloadVault — Reloading Log](https://appshunter.io/ios/app/reloadvault-reloading-log/id6788529718)
- [BonsaiLog: Bonsai Care Log](https://appshunter.io/ios/app/bonsailog-bonsai-care-log/id6789196023)
- [Watch Reader: Identify & Learn](https://appshunter.io/ios/app/watch-reader-identify-and-learn/id6790629476)

All apps by TOBY M BERGER: https://appshunter.io/developer/6776950197

---

*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 2026-07-27.*