# AquaTrackr vs TankDiary

The clearest difference is iOS requirement: TankDiary at 15.0 against AquaTrackr's 26.1. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. AquaTrackr sells 1 in-app purchase, starting at $2.99 per month and TankDiary sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 days. The most recent releases landed on November 5, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | AquaTrackr | TankDiary |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 days | Every 3 days |
| Size | 15 MB | 54 MB |
| Requires iOS | 26.1 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Juman Shota](https://appshunter.io/developer/1872694655) | [kazuki korenori](https://appshunter.io/developer/1884835388) |

## What reviewers say

### AquaTrackr

[App page](https://appshunter.io/ios/app/aquatrackr/id6760959164)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Aquarium Pro | $2.99 | per month |


### TankDiary

[App page](https://appshunter.io/ios/app/tankdiary/id6762593557)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TankDiary Pro | $5.99 | one-time |


## Frequently asked questions

### Is AquaTrackr free?

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

### Is TankDiary free?

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

### Do AquaTrackr or TankDiary have ads?

Neither AquaTrackr nor TankDiary shows ads.

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

AquaTrackr ships an update every 3 days, and TankDiary every 3 days. Most recently, AquaTrackr was updated on November 5, 2026 and TankDiary on November 9, 2026.

---

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