# TankSide vs TankDiary

The clearest difference is in-app purchases: TankSide at none against TankDiary's 2. TankDiary's advantage is update cadence (every 11 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. TankDiary sells 2 in-app purchases, starting at $9.99 per year. TankSide asks for nothing beyond the download.

TankSide ships an update monthly, TankDiary every 11 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | TankSide | TankDiary |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 11 days** |
| Monetization | — | Free with in-app purchases |
| Size | 5 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Caden Bartlett](https://appshunter.io/developer/1889384537) | [TOBY M BERGER](https://appshunter.io/developer/6776950197) |

## What reviewers say

### TankSide

[App page](https://appshunter.io/ios/app/tankside/id6766981651)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is TankSide free?

TankSide is free to download, with no in-app purchases.

### Is TankDiary free?

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

### Do TankSide or TankDiary have ads?

Neither TankSide nor TankDiary shows ads.

### Which is updated more often, TankSide or TankDiary?

TankSide ships an update monthly, and TankDiary every 11 days. Most recently, TankSide was updated on October 25, 2026 and TankDiary on October 24, 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.*