# ReefKeep vs Scalo

The clearest difference is update cadence: ReefKeep at daily against Scalo's fortnightly. Scalo's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ReefKeep sells 3 in-app purchases, starting at $4.99 per month and Scalo sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReefKeep ships an update daily, Scalo fortnightly. The most recent releases landed on September 22, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | ReefKeep | Scalo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Fortnightly |
| Size | 2 MB | 21 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Enovira AB](https://appshunter.io/developer/1878624311) | [Davie Power](https://appshunter.io/developer/6789033406) |

## What reviewers say

### ReefKeep

[App page](https://appshunter.io/ios/app/reefkeep/id6762442240)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ReefKeep Pro - monthly | $4.99 | per month |
| ReefKeep Pro - Yearly | $29.99 | per year |
| ReefKeep Lifetime Subscription | $79.99 | one-time |


### Scalo

[App page](https://appshunter.io/ios/app/scalo-weight/id6789033403)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coin1 | $0.99 | one-time |
| Coin2 | $2.99 | one-time |
| Coin3 | $9.99 | one-time |
| Coin4 | $19.99 | one-time |
| Coin5 | $49.99 | one-time |
| Coin6 | $99.99 | one-time |


## Frequently asked questions

### Is ReefKeep free?

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

### Is Scalo free?

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

### Do ReefKeep or Scalo have ads?

Neither ReefKeep nor Scalo shows ads.

### Which is updated more often, ReefKeep or Scalo?

ReefKeep ships an update daily, and Scalo fortnightly. Most recently, ReefKeep was updated on September 22, 2026 and Scalo on September 17, 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.*