# Kraftvrk vs Caffeine Tracker

The clearest difference is in-app purchases: Kraftvrk at none against Caffeine Tracker's 2. Kraftvrk also leads on iOS requirement (15.5 vs 26.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Caffeine Tracker sells 2 in-app purchases, starting at $4.99 per year. Kraftvrk asks for nothing beyond the download.

Kraftvrk ships an update every 11 days, Caffeine Tracker every 8 days. The most recent releases landed on October 20, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Kraftvrk | Caffeine Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/caffeine-tracker-doppio/id6758040507/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 8 days** |
| Monetization | — | Freemium |
| Size | 67 MB | 20 MB |
| Requires iOS | **15.5** | 26.1 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Booking Board](https://appshunter.io/developer/1698899191) | [MOBILE CODING FACTORY DOO](https://appshunter.io/developer/1590013609) |

## What reviewers say

### Kraftvrk

[App page](https://appshunter.io/ios/app/kraftvrk/id6443487130)

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

**In-app purchases:** none


### Caffeine Tracker

[App page](https://appshunter.io/ios/app/caffeine-tracker-doppio/id6758040507)

This app helps you track your caffeine intake and understand its impact on your sleep. It provides personalized insights into your caffeine metabolism, allowing you to build better habits and brew coffee like a pro. Syncs with Apple Health for comprehensive sleep analysis.

**Highlights:** Log caffeine intake with custom drinks, Personalized metabolism curve and half-life, Caffeine level forecasts, Sleep rating and efficiency tracking, Brewing calculator and timer, Apple Health integration, Detox planner

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Doppio Pro Yearly | $4.99 | per year |
| Doppio Lifetime | $12.99 | one-time |


## Frequently asked questions

### Is Kraftvrk free?

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

### Is Caffeine Tracker free?

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

### Do Kraftvrk or Caffeine Tracker have ads?

Neither Kraftvrk nor Caffeine Tracker shows ads.

### Which is updated more often, Kraftvrk or Caffeine Tracker?

Kraftvrk ships an update every 11 days, and Caffeine Tracker every 8 days. Most recently, Kraftvrk was updated on October 20, 2026 and Caffeine Tracker on October 15, 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.*