# Celerlight vs REBT Pro

The clearest difference is in-app purchases: Celerlight at none against REBT Pro's 2. Celerlight also leads on iOS requirement (13.0 vs 17.6). REBT Pro's advantage is update cadence (every 8 days vs every 14 months). On price, ads and device support there is nothing between them.

Both are free to download. REBT Pro sells 2 in-app purchases, starting at $3.99 per month. Celerlight asks for nothing beyond the download.

Celerlight ships an update every 14 months, REBT Pro every 8 days. The most recent releases landed on October 2, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Celerlight | REBT Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 8 days** |
| Size | 197 MB | 27 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [BRASS & FITTINGS, SL](https://appshunter.io/developer/1707753167) | [Manuel Mogrovejo](https://appshunter.io/developer/1888765151) |

## What reviewers say

### Celerlight

[App page](https://appshunter.io/ios/app/celerlight/id6466745415)

**In-app purchases:** none


### REBT Pro

[App page](https://appshunter.io/ios/app/rebt-pro/id6761301576)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| REBT Pro Mensual | $3.99 | per month |
| REBT Pro Anual | $34.99 | per year |


## Frequently asked questions

### Is Celerlight free?

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

### Is REBT Pro free?

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

### Do Celerlight or REBT Pro have ads?

Neither Celerlight nor REBT Pro shows ads.

### Which is updated more often, Celerlight or REBT Pro?

Celerlight ships an update every 14 months, and REBT Pro every 8 days. Most recently, Celerlight was updated on October 2, 2026 and REBT Pro on October 1, 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.*