# Red Light Therapy vs RLT SYSTEM MASTER

The clearest difference is in-app purchases: RLT SYSTEM MASTER at none against Red Light Therapy's 1. RLT SYSTEM MASTER also leads on ads (none vs shown) and update cadence (every 4 days vs every 3 weeks). On price and device support there is nothing between them.

Both are free to download. Red Light Therapy sells 1 in-app purchase, starting at $1.99 per month. RLT SYSTEM MASTER asks for nothing beyond the download.

Red Light Therapy ships an update every 3 weeks, RLT SYSTEM MASTER every 4 days. The most recent releases landed on October 18, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Red Light Therapy | RLT SYSTEM MASTER |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 85 MB | 37 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Paws And Pixels Ayaz Bilisim Ticaret Limited Sirketi](https://appshunter.io/developer/1712354185) | [中玲 曹](https://appshunter.io/developer/1682161709) |

## What reviewers say

### Red Light Therapy

[App page](https://appshunter.io/ios/app/red-light-therapy/id6760614207)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Red Light Therapy Pro Monthly | $1.99 | per month |


### RLT SYSTEM MASTER

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

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

**In-app purchases:** none


## Frequently asked questions

### Is Red Light Therapy free?

Red Light Therapy is free to download, with in-app purchases available.

### Is RLT SYSTEM MASTER free?

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

### Do Red Light Therapy or RLT SYSTEM MASTER have ads?

Red Light Therapy shows ads; RLT SYSTEM MASTER does not.

### Which is updated more often, Red Light Therapy or RLT SYSTEM MASTER?

Red Light Therapy ships an update every 3 weeks, and RLT SYSTEM MASTER every 4 days. Most recently, Red Light Therapy was updated on October 18, 2026 and RLT SYSTEM MASTER on October 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*