# CoreCapacity vs Energy Tracker

The clearest difference is in-app purchases: CoreCapacity at none against Energy Tracker's 7. CoreCapacity also leads on iOS requirement (16.4 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Energy Tracker sells 7 in-app purchases, starting at $2.99 per 7 days. CoreCapacity asks for nothing beyond the download.

CoreCapacity ships an update every 11 days, Energy Tracker every 2 weeks. Both last shipped on October 30, 2026.

## The numbers

| Metric | CoreCapacity | Energy Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.8 (4 ratings)](https://appshunter.io/ios/app/energy-tracker-peak-score/id6749524670/reviews)** |
| Number of ratings | — | **4** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 62 MB | 43 MB |
| Requires iOS | **16.4** | 26.0 |
| Devices | iPhone, iPad | iPhone, Apple Watch |
| Age rating | 4+ | 17+ |
| Developer | [Paral Dynamic AS](https://appshunter.io/developer/1810307891) | [Jan Slaby](https://appshunter.io/developer/1830932776) |

## What reviewers say

### CoreCapacity

[App page](https://appshunter.io/ios/app/corecapacity/id6747709322)

**Features:** macOS Compatibility

**In-app purchases:** none


### Energy Tracker

[App page](https://appshunter.io/ios/app/energy-tracker-peak-score/id6749524670)

This app analyzes your Apple Watch data to provide a daily readiness score, guiding you on whether to train hard or rest. It offers insights into HRV, sleep, and training load, with an on-device AI coach for personalized guidance.

**Highlights:** Daily Readiness Score, HRV Tracking, Training Load Analysis, Sleep Score Integration, 7-Day Readiness Trend, Tomorrow's Readiness Prediction, On-Device AI Coach

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Access (Weekly) | $2.99 | per 7 days |
| PRO Access - 1 Week | $3.99 | per 7 days |
| PRO Access (Monthly) | $4.99 | per month |
| PRO Access (Monthly) | $9.99 | per month |
| PRO Access (Annual) | $29.99 | per year |
| PRO Access (Annual) | $39.99 | per year |
| PRO Access (Lifetime) | $29.99 | one-time |


## Frequently asked questions

### Is CoreCapacity free?

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

### Is Energy Tracker free?

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

### Do CoreCapacity or Energy Tracker have ads?

Neither CoreCapacity nor Energy Tracker shows ads.

### Which is updated more often, CoreCapacity or Energy Tracker?

CoreCapacity ships an update every 11 days, and Energy Tracker every 2 weeks. Most recently, CoreCapacity was updated on October 30, 2026 and Energy Tracker on October 30, 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.*