# Prompt 21 vs Open Micer Timer

The clearest difference is update cadence: Prompt 21 at every 4 days against Open Micer Timer's every 5 months. Prompt 21 also leads on iOS requirement (15.1 vs 26.1). 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.

Prompt 21 ships an update every 4 days, Open Micer Timer every 5 months. Both last shipped on October 11, 2026.

## The numbers

| Metric | Prompt 21 | Open Micer Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 months |
| Size | 39 MB | 2 MB |
| Requires iOS | **15.1** | 26.1 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Cheuk Hin Wong](https://appshunter.io/developer/1833016596) | [Taylor Drew](https://appshunter.io/developer/1834365570) |

## What reviewers say

### Prompt 21

[App page](https://appshunter.io/ios/app/prompt-21/id6752573818)

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

**In-app purchases:** none


### Open Micer Timer

[App page](https://appshunter.io/ios/app/open-micer-timer/id6756205253)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prompt 21 free?

Prompt 21 is free to download, with no in-app purchases.

### Is Open Micer Timer free?

Open Micer Timer is free to download, with no in-app purchases.

### Do Prompt 21 or Open Micer Timer have ads?

Neither Prompt 21 nor Open Micer Timer shows ads.

### Which is updated more often, Prompt 21 or Open Micer Timer?

Prompt 21 ships an update every 4 days, and Open Micer Timer every 5 months. Most recently, Prompt 21 was updated on October 11, 2026 and Open Micer Timer on October 11, 2026.

---

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