# Trial&Error vs First05

The clearest difference is in-app purchases: First05 at none against Trial&Error's 2. First05 also leads on ads (none vs shown) and update cadence (every 2 days vs weekly). Trial&Error's advantage is iOS requirement (15.4 vs 17.6). On price and device support there is nothing between them.

Both are free to download. Trial&Error sells 2 in-app purchases, starting at $0.49 per month. First05 asks for nothing beyond the download.

Trial&Error ships an update weekly, First05 every 2 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Trial&Error | First05 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 2 days** |
| Size | 17 MB | 4 MB |
| Requires iOS | **15.4** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Naruhito Ozawa](https://appshunter.io/developer/1166703594) | [Rapro](https://appshunter.io/developer/6772112879) |

## What reviewers say

### Trial&Error

[App page](https://appshunter.io/ios/app/trial-and-error/id1612021152)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly fee | $0.49 | per month |
| PremiumPlan(onetime-purchase) | $2.99 | one-time |


### First05

[App page](https://appshunter.io/ios/app/first05/id6772112877)

**In-app purchases:** none


## Frequently asked questions

### Is Trial&Error free?

Trial&Error is free to download, with in-app purchases available.

### Is First05 free?

First05 is free to download, with no in-app purchases.

### Do Trial&Error or First05 have ads?

Trial&Error shows ads; First05 does not.

### Which is updated more often, Trial&Error or First05?

Trial&Error ships an update weekly, and First05 every 2 days. Most recently, Trial&Error was updated on October 1, 2026 and First05 on October 7, 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.*