# ReefNote vs Tankstead

The clearest difference is in-app purchases: Tankstead at none against ReefNote's 3. Tankstead also leads on iOS requirement (16.4 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ReefNote sells 3 in-app purchases, starting at $5.99 per month. Tankstead asks for nothing beyond the download.

ReefNote ships an update every 3 weeks, Tankstead every 6 weeks. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | ReefNote | Tankstead |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 6 MB | 47 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [InnovaLabWorks](https://appshunter.io/developer/1888514726) | [Carter Liu](https://appshunter.io/developer/1890338811) |

## What reviewers say

### ReefNote

[App page](https://appshunter.io/ios/app/reefnote-aquarium-log/id6788604575)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReefNote Pro | $5.99 | per month |
| ReefNote Pro | $34.99 | per year |
| ReefNote Lifetime | $2.99 | one-time |


### Tankstead

[App page](https://appshunter.io/ios/app/tankstead/id6793655729)

**In-app purchases:** none


## Frequently asked questions

### Is ReefNote free?

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

### Is Tankstead free?

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

### Do ReefNote or Tankstead have ads?

Neither ReefNote nor Tankstead shows ads.

### Which is updated more often, ReefNote or Tankstead?

ReefNote ships an update every 3 weeks, and Tankstead every 6 weeks. Most recently, ReefNote was updated on October 28, 2026 and Tankstead on October 29, 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.*