# Ksteps vs Caffeine mg

The clearest difference is in-app purchases: Ksteps at none against Caffeine mg's 1. Caffeine mg's advantage is iOS requirement (18.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Caffeine mg sells 1 one-off in-app purchase. Ksteps asks for nothing beyond the download.

Ksteps ships an update every 5 days, Caffeine mg weekly. The most recent releases landed on October 9, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Ksteps | Caffeine mg |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Weekly |
| Size | 10 MB | 5 MB |
| Requires iOS | 26.0 | **18.0** |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kiyeong Jeong](https://appshunter.io/developer/1884802566) | [kensuke ueda](https://appshunter.io/developer/961845390) |

## What reviewers say

### Ksteps

[App page](https://appshunter.io/ios/app/ksteps/id6760519760)

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

**In-app purchases:** none


### Caffeine mg

[App page](https://appshunter.io/ios/app/caffeine-mg-half-life-tracker/id6763047063)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| カフェインmg Pro | $1.99 | one-time |


## Frequently asked questions

### Is Ksteps free?

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

### Is Caffeine mg free?

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

### Do Ksteps or Caffeine mg have ads?

Neither Ksteps nor Caffeine mg shows ads.

### Which is updated more often, Ksteps or Caffeine mg?

Ksteps ships an update every 5 days, and Caffeine mg weekly. Most recently, Ksteps was updated on October 9, 2026 and Caffeine mg 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.*