# ReefLog vs Reef Stability

The clearest difference is device support: ReefLog at 3 against Reef Stability's 1. ReefLog also leads on iOS requirement (13.0 vs 18.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. ReefLog sells 3 in-app purchases, starting at $2.99 per 7 days and Reef Stability sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | ReefLog | Reef Stability |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Weekly |
| Size | 39 MB | 9 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Katsuyuki Hayashi](https://appshunter.io/developer/1597263179) | [YUSUF AYDIN](https://appshunter.io/developer/6771871523) |

## What reviewers say

### ReefLog

[App page](https://appshunter.io/ios/app/reeflog-reef-tank-tracker/id6791190017)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $2.99 | per 7 days |
| Annual | $29.99 | per year |
| Lifetime | $44.99 | one-time |


### Reef Stability

[App page](https://appshunter.io/ios/app/reef-stability-dosing-tracker/id6799461220)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $6.99 | per month |
| Premium Annual | $39.99 | per year |
| Premium Lifetime | $89.99 | one-time |


## Frequently asked questions

### Is ReefLog free?

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

### Is Reef Stability free?

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

### Do ReefLog or Reef Stability have ads?

Neither ReefLog nor Reef Stability shows ads.

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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.*