# RLT SYSTEM MASTER vs Rubi

The clearest difference is in-app purchases: RLT SYSTEM MASTER at none against Rubi's 4. RLT SYSTEM MASTER also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.6). On price and ads there is nothing between them.

Both are free to download. Rubi sells 4 one-off in-app purchases. RLT SYSTEM MASTER asks for nothing beyond the download.

## The numbers

| Metric | RLT SYSTEM MASTER | Rubi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | — |
| Size | 37 MB | 6 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [中玲 曹](https://appshunter.io/developer/1682161709) | [Timothy Richardson](https://appshunter.io/developer/662838465) |

## What reviewers say

### RLT SYSTEM MASTER

[App page](https://appshunter.io/ios/app/rlt-system-master/id6790787023)

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

**In-app purchases:** none


### Rubi

[App page](https://appshunter.io/ios/app/rubi-red-light-therapy/id6791000685)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Large Tip | $4.99 | one-time |
| Rubi Pro Forever | $9.99 | one-time |


## Frequently asked questions

### Is RLT SYSTEM MASTER free?

RLT SYSTEM MASTER is free to download, with no in-app purchases.

### Is Rubi free?

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

### Do RLT SYSTEM MASTER or Rubi have ads?

Neither RLT SYSTEM MASTER nor Rubi shows ads.

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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.*