# MRTLE vs TT420C2308 /  FIRST

The clearest difference is update cadence: TT420C2308 /  FIRST at every 3 months against MRTLE's every 17 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MRTLE ships an update every 17 months, TT420C2308 /  FIRST every 3 months. The most recent releases landed on May 15, 2026 and June 21, 2026 respectively.

## The numbers

| Metric | MRTLE | TT420C2308 /  FIRST |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 3 months** |
| Size | 10 MB | 69 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Irody Inc.](https://appshunter.io/developer/362460645) | [ERT, INC](https://appshunter.io/developer/1160214546) |

## What reviewers say

### MRTLE

[App page](https://appshunter.io/ios/app/mrtle-ole-study/id1537635694)

**Features:** macOS Compatibility

**In-app purchases:** none


### TT420C2308 /  FIRST

[App page](https://appshunter.io/ios/app/tt420c2308-first-308/id6448976706)

**In-app purchases:** none


## Frequently asked questions

### Is MRTLE free?

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

### Is TT420C2308 /  FIRST free?

TT420C2308 /  FIRST is free to download, with no in-app purchases.

### Do MRTLE or TT420C2308 /  FIRST have ads?

Neither MRTLE nor TT420C2308 /  FIRST shows ads.

### Which is updated more often, MRTLE or TT420C2308 /  FIRST?

MRTLE ships an update every 17 months, and TT420C2308 /  FIRST every 3 months. Most recently, MRTLE was updated on May 15, 2026 and TT420C2308 /  FIRST on June 21, 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.*