# Pacing vs CFS Tracker

The clearest difference is in-app purchases: Pacing at none against CFS Tracker's 16. Pacing also leads on update cadence (every 4 days vs every 8 months). CFS Tracker's advantage is device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Both are free to download. CFS Tracker sells 16 in-app purchases, starting at $4.95 per month. Pacing asks for nothing beyond the download.

Pacing ships an update every 4 days, CFS Tracker every 8 months. The most recent releases landed on September 29, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Pacing | CFS Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (2 ratings)](https://appshunter.io/ios/app/cfs-tracker/id6743564981/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 8 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 219 MB |
| Requires iOS | 16.6 | **15.5** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | +4 |
| Developer | [Q_PERIOR AG](https://appshunter.io/developer/532082988) | [Digital Therapeutics](https://appshunter.io/developer/1721663167) |

## What reviewers say

### Pacing

[App page](https://appshunter.io/ios/app/pacing/id6448513970)

This app helps individuals with ME/CFS manage their activity levels by monitoring heart rate against personalized thresholds. It provides visual cues and alerts to prevent overexertion and potential relapses, integrating with Apple Health for comprehensive tracking.

**Highlights:** Activity management for ME/CFS, Personalized heart rate thresholds, Relapse prevention alerts, Visual heart rate zone indicators, Apple Health integration, Apple Watch exclusive

**Features:** Apple Watch app

**In-app purchases:** none


### CFS Tracker

[App page](https://appshunter.io/ios/app/cfs-tracker/id6743564981)

This app helps individuals manage energy-limiting chronic illnesses by tracking symptoms, pacing, medications, and daily activities. It provides insights into patterns and trends to better understand health and communicate with healthcare providers.

**Highlights:** Log diverse symptoms including fatigue and brain fog, Track medications, supplements, and treatments, Record activity, rest, sleep, and nutrition, Customize tracking for personal health patterns, Set reminders for health routines, Monitor post-exertional malaise (PEM) and crashes, Review symptom trends with charts and summaries

**Features:** macOS Compatibility, Siri integration, Apple Watch app, iMessage stickers, Vision Pro support

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| flex pass | $4.95 | per month |
| easy pass | $5.99 | per 7 days |
| flex pass | $8.99 | per month |
| carey ai max | $19.99 | per month |
| yearly access | $19.99 | per year |
| smart pass | $24.99 | per year |
| carey ai ultra | $29.99 | per month |
| plus | $29.99 | per year |
| limited discount | $29.99 | per year |
| Premium Yearly | $34.99 | per year |
| yearly access | $39.99 | per year |
| Extended Trial | $39.99 | per year |
| 7-Day Trial | $49.99 | per year |
| store credit | $1.99 | one-time |
| carey ai credits | $8.99 | one-time |
| lifetime upgrade | $99.99 | one-time |


## Frequently asked questions

### Is Pacing free?

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

### Is CFS Tracker free?

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

### Do Pacing or CFS Tracker have ads?

Neither Pacing nor CFS Tracker shows ads.

### Which is updated more often, Pacing or CFS Tracker?

Pacing ships an update every 4 days, and CFS Tracker every 8 months. Most recently, Pacing was updated on September 29, 2026 and CFS Tracker on September 20, 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.*