# ATOAWC vs ReefDrift

The clearest difference is in-app purchases: ATOAWC at none against ReefDrift's 3. ATOAWC also leads on ads (none vs shown) and iOS requirement (9.0 vs 18.2). ReefDrift's advantage is update cadence (every 2 weeks vs every 5 months). On price and device support there is nothing between them.

Both are free to download. ReefDrift sells 3 in-app purchases, starting at $3.99 per month. ATOAWC asks for nothing beyond the download.

ATOAWC ships an update every 5 months, ReefDrift every 2 weeks. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ATOAWC | ReefDrift |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Size | 19 MB | 16 MB |
| Requires iOS | **9.0** | 18.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [志勇 卢](https://appshunter.io/developer/1304223073) | [Muge Akalin](https://appshunter.io/developer/1701314808) |

## What reviewers say

### ATOAWC

[App page](https://appshunter.io/ios/app/atoawc/id1304223074)

**Features:** macOS Compatibility

**In-app purchases:** none


### ReefDrift

[App page](https://appshunter.io/ios/app/reefdrift-reef-parameter-log/id6775145577)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReefDrift Pro Monthly | $3.99 | per month |
| ReefDrift Pro Yearly | $19.99 | per year |
| ReefDrift Pro Lifetime | $59.99 | one-time |


## Frequently asked questions

### Is ATOAWC free?

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

### Is ReefDrift free?

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

### Do ATOAWC or ReefDrift have ads?

ReefDrift shows ads; ATOAWC does not.

### Which is updated more often, ATOAWC or ReefDrift?

ATOAWC ships an update every 5 months, and ReefDrift every 2 weeks. Most recently, ATOAWC was updated on October 3, 2026 and ReefDrift on October 10, 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.*