# Reef Buddy vs reefAZ

The clearest difference is iOS requirement: reefAZ at 16.4 against Reef Buddy's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Reef Buddy sells 4 in-app purchases, starting at $0.99 per 7 days and reefAZ sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Reef Buddy | reefAZ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (20 ratings)](https://appshunter.io/ios/app/reef-buddy-reef-tank-tracker/id1593580822/reviews)** | — |
| Number of ratings | **20** | — |
| Positive reviews | 54.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Freemium | — |
| Size | 46 MB | 186 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [District Web](https://appshunter.io/developer/595076846) | [Ryan Trung](https://appshunter.io/developer/6801448516) |

## What reviewers say

### Reef Buddy

[App page](https://appshunter.io/ios/app/reef-buddy-reef-tank-tracker/id1593580822)

Easily log, monitor, and analyze your saltwater aquarium's critical parameters. Get smart insights and personalized advice to maintain a healthy reef tank. Syncs across devices and offers guidance for manual test results.

**Highlights:** Log critical aquarium parameters, Monitor KH, salinity, pH, Ca, Mg, and more, Analyze data with automated insights, Sync data across iPhone and iPad, Guidance for manual test kit results, Personalized advice with premium subscription

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Reef Buddy Pro Weekly | $0.99 | per 7 days |
| Reef Buddy Pro | $1.99 | per month |
| Reef buddy pro month | $3.99 | per month |
| Reef buddy pro annual | $44.99 | per year |


### reefAZ

[App page](https://appshunter.io/ios/app/reefaz/id6801448514)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReefAZ Premium | $0.99 | per month |
| ReefAZ Premium | $13.99 | per year |
| ReefAZ Premium | $29.99 | one-time |


## Frequently asked questions

### Is Reef Buddy free?

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

### Is reefAZ free?

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

### Do Reef Buddy or reefAZ have ads?

Neither Reef Buddy nor reefAZ shows ads.

### Which is updated more often, Reef Buddy or reefAZ?

Reef Buddy ships an update every 2 weeks, and reefAZ every 2 weeks. Most recently, Reef Buddy was updated on October 24, 2026 and reefAZ 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.*