# All in One Formula vs RRU

The clearest difference is in-app purchases: RRU at none against All in One Formula's 1. RRU also leads on update cadence (weekly vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. All in One Formula sells 1 one-off in-app purchase. RRU asks for nothing beyond the download.

All in One Formula ships an update every 6 months, RRU weekly. The most recent releases landed on October 6, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | All in One Formula | RRU |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Weekly** |
| Size | 90 MB | 25 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Raj Dev Barman](https://appshunter.io/developer/1832913213) | [Nirav Patel](https://appshunter.io/developer/1451634418) |

## What reviewers say

### All in One Formula

[App page](https://appshunter.io/ios/app/all-in-one-formula-math-ai/id6749927877)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All-in-One Formula Pro | $24.99 | one-time |


### RRU

[App page](https://appshunter.io/ios/app/rru/id6751452021)

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

**In-app purchases:** none


## Frequently asked questions

### Is All in One Formula free?

All in One Formula is free to download, with in-app purchases available.

### Is RRU free?

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

### Do All in One Formula or RRU have ads?

Neither All in One Formula nor RRU shows ads.

### Which is updated more often, All in One Formula or RRU?

All in One Formula ships an update every 6 months, and RRU weekly. Most recently, All in One Formula was updated on October 6, 2026 and RRU on October 19, 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.*