# Regular Expression Test vs Insterm

The clearest difference is ads: Regular Expression Test at none against Insterm's shown. Regular Expression Test also leads on iOS requirement (14.0 vs 17.0). Insterm's advantage is update cadence (every 5 months vs every 49 months). On price, 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.

Regular Expression Test ships an update every 49 months, Insterm every 5 months. Both last shipped on October 6, 2026.

## The numbers

| Metric | Regular Expression Test | Insterm |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 49 months | **Every 5 months** |
| Size | 0 MB | 10 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [SHIN INABA](https://appshunter.io/developer/800415932) | [Yusuke Mori](https://appshunter.io/developer/1662278979) |

## What reviewers say

### Regular Expression Test

[App page](https://appshunter.io/ios/app/regular-expression-test/id800415929)

**Features:** macOS Compatibility

**In-app purchases:** none


### Insterm

[App page](https://appshunter.io/ios/app/insterm/id6742595334)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Regular Expression Test free?

Regular Expression Test is free to download, with no in-app purchases.

### Is Insterm free?

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

### Do Regular Expression Test or Insterm have ads?

Insterm shows ads; Regular Expression Test does not.

### Which is updated more often, Regular Expression Test or Insterm?

Regular Expression Test ships an update every 49 months, and Insterm every 5 months. Most recently, Regular Expression Test was updated on October 6, 2026 and Insterm on October 6, 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.*