# Cafactor vs CaffeineX

The clearest difference is in-app purchases: CaffeineX at none against Cafactor's 1. CaffeineX also leads on update cadence (every 3 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

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

Cafactor ships an update weekly, CaffeineX every 3 days. The most recent releases landed on September 25, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Cafactor | CaffeineX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cafactor/id6757445668/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Monetization | Freemium | — |
| Size | 9 MB | 3 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nan Yu](https://appshunter.io/developer/1559044036) | [来 徐](https://appshunter.io/developer/1871065941) |

## What reviewers say

### Cafactor

[App page](https://appshunter.io/ios/app/cafactor/id6757445668)

This app models your body's real-time caffeine levels using a scientific pharmacokinetic approach. It helps you understand your caffeine absorption, decay, and personal sleep thresholds, adapting to your unique biology and activity. Connect with health data for an even smarter metabolic coaching experience.

**Highlights:** Real-time caffeine curve modeling, Personalized physiological parameters, HealthKit integration for adaptive coaching, Exercise and sleep-adaptive thresholds, HRV & Recovery integration, Progressive calibration of half-life, Offline, private tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cafactor Pro | $3.99 | one-time |


### CaffeineX

[App page](https://appshunter.io/ios/app/caffeinex/id6760469305)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cafactor free?

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

### Is CaffeineX free?

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

### Do Cafactor or CaffeineX have ads?

Neither Cafactor nor CaffeineX shows ads.

### Which is updated more often, Cafactor or CaffeineX?

Cafactor ships an update weekly, and CaffeineX every 3 days. Most recently, Cafactor was updated on September 25, 2026 and CaffeineX on October 7, 2026.

---

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