# Rainbow Authenticator vs Simmerix

The clearest difference is in-app purchases: Simmerix at none against Rainbow Authenticator's 1. Simmerix also leads on update cadence (daily vs monthly). Rainbow Authenticator's advantage is iOS requirement (12.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Rainbow Authenticator sells 1 in-app purchase, starting at $4.99 per year. Simmerix asks for nothing beyond the download.

Rainbow Authenticator ships an update monthly, Simmerix daily. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Rainbow Authenticator | Simmerix |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Daily** |
| Size | 32 MB | 88 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [彦欣 吴](https://appshunter.io/developer/1628212399) | [Duran Veysel KALE](https://appshunter.io/developer/6778686914) |

## What reviewers say

### Rainbow Authenticator

[App page](https://appshunter.io/ios/app/rainbow-authenticator/id6444103637)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly(30-day trial) | $4.99 | per year |


### Simmerix

[App page](https://appshunter.io/ios/app/simmerix/id6778686912)

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

**In-app purchases:** none


## Frequently asked questions

### Is Rainbow Authenticator free?

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

### Is Simmerix free?

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

### Do Rainbow Authenticator or Simmerix have ads?

Neither Rainbow Authenticator nor Simmerix shows ads.

### Which is updated more often, Rainbow Authenticator or Simmerix?

Rainbow Authenticator ships an update monthly, and Simmerix daily. Most recently, Rainbow Authenticator was updated on September 19, 2026 and Simmerix on September 24, 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.*