# GRINDS AIR vs 20s Timer

The clearest difference is in-app purchases: GRINDS AIR at none against 20s Timer's 1. GRINDS AIR also leads on ads (none vs shown) and update cadence (every 2 months vs every 37 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 20s Timer sells 1 one-off in-app purchase. GRINDS AIR asks for nothing beyond the download.

GRINDS AIR ships an update every 2 months, 20s Timer every 37 months. The most recent releases landed on October 18, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | GRINDS AIR | 20s Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/20s-timer/id1521305784/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 months** | Every 37 months |
| Monetization | — | Free with in-app purchases |
| Size | 34 MB | 6 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Matthias Friesen](https://appshunter.io/developer/1506710638) | [MARK MANSER](https://appshunter.io/developer/1378563905) |

## What reviewers say

### GRINDS AIR

[App page](https://appshunter.io/ios/app/grinds-air/id1506710639)

**Features:** macOS Compatibility

**In-app purchases:** none


### 20s Timer

[App page](https://appshunter.io/ios/app/20s-timer/id1521305784)

This utility app provides a simple 20-second timer with customizable notification sounds and reminders. It's designed for quick tasks like power workouts or essential duties, with an option to remove ads via in-app purchase.

**Highlights:** 20-second timer, Customizable notification sounds, Reminder functionality, Ideal for power workouts, Timing essential duties, Ad removal via in-app purchase

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Frequently asked questions

### Is GRINDS AIR free?

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

### Is 20s Timer free?

20s Timer is free to download, with in-app purchases available.

### Do GRINDS AIR or 20s Timer have ads?

20s Timer shows ads; GRINDS AIR does not.

### Which is updated more often, GRINDS AIR or 20s Timer?

GRINDS AIR ships an update every 2 months, and 20s Timer every 37 months. Most recently, GRINDS AIR was updated on October 18, 2026 and 20s Timer on October 26, 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.*