# Pulse vs kerf

The clearest difference is in-app purchases: Pulse at none against kerf's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. kerf sells 1 one-off in-app purchase. Pulse asks for nothing beyond the download.

## The numbers

| Metric | Pulse | kerf |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 31 MB | 8 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mert Aydogan](https://appshunter.io/developer/1896119444) | [Yakup Arslan](https://appshunter.io/developer/1583950519) |

## What reviewers say

### Pulse

[App page](https://appshunter.io/ios/app/pulse-one-tap-timing/id6786884586)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### kerf

[App page](https://appshunter.io/ios/app/kerf-stack-tower/id6812035711)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| kerf Complete | $4.99 | one-time |


## Frequently asked questions

### Is Pulse free?

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

### Is kerf free?

kerf is free to download, with in-app purchases available.

### Do Pulse or kerf have ads?

Neither Pulse nor kerf shows ads.

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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.*