# TankDiary vs Aquarium Manager

The clearest difference is ads: TankDiary at none against Aquarium Manager's shown. Aquarium Manager's advantage is update cadence (every 4 days vs every 11 days) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. TankDiary sells 2 in-app purchases, starting at $9.99 per year and Aquarium Manager sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

TankDiary ships an update every 11 days, Aquarium Manager every 4 days. The most recent releases landed on October 31, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | TankDiary | Aquarium Manager |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tankdiary-aquarium-tracker/id6788005172/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 11 days | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 50 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOBY M BERGER](https://appshunter.io/developer/6776950197) | [MEHMET CANKER (TR)](https://appshunter.io/developer/1565350155) |

## What reviewers say

### TankDiary

[App page](https://appshunter.io/ios/app/tankdiary-aquarium-tracker/id6788005172)

Easily track aquarium water parameters, schedule maintenance, and monitor your tank's health. This app helps you understand your tank's cycling stage and provides reliable reminders for water changes and other tasks. It offers detailed logging and historical charts for long-term trend analysis.

**Highlights:** Log water test results (ammonia, nitrite, nitrate, pH, etc.), Identify aquarium cycle stage, Schedule maintenance reminders (water changes, dosing), Water change calculator, Livestock and photo journal, Offline functionality, Interactive historical charts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TankDiary Pro — Yearly | $9.99 | per year |
| TankDiary Pro — Lifetime | $24.99 | one-time |


### Aquarium Manager

[App page](https://appshunter.io/ios/app/aquarium-manager/id6790680603)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aquarium Manager Pro monthly | $4.99 | per month |
| Aquarium Manager Pro annual | $29.99 | per year |


## Frequently asked questions

### Is TankDiary free?

TankDiary is free to download, with in-app purchases available.

### Is Aquarium Manager free?

Aquarium Manager is free to download, with in-app purchases available.

### Do TankDiary or Aquarium Manager have ads?

Aquarium Manager shows ads; TankDiary does not.

### Which is updated more often, TankDiary or Aquarium Manager?

TankDiary ships an update every 11 days, and Aquarium Manager every 4 days. Most recently, TankDiary was updated on October 31, 2026 and Aquarium Manager on October 25, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*