# Navy PFA Calc vs Chill Drills

The clearest difference is price: Chill Drills at Free against Navy PFA Calc's $1.99. Navy PFA Calc's advantage is rating (4.8 vs 4.4) and update cadence (every 3 weeks vs every 4 months). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

Chill Drills is free to download; Navy PFA Calc costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Navy PFA Calc holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Navy PFA Calc has 316 ratings behind it against 21, so its average is the more settled of the two. Written reviews point the same way: 74% of Navy PFA Calc's written reviews are positive against 67% of Chill Drills's.

Navy PFA Calc ships an update every 3 weeks, Chill Drills every 4 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Navy PFA Calc | Chill Drills |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.8 (316 ratings)](https://appshunter.io/ios/app/navy-pfa-calc/id823959487/reviews)** | [4.4 (21 ratings)](https://appshunter.io/ios/app/chill-drills/id1552953408/reviews) |
| Number of ratings | **316** | 21 |
| Positive reviews | **74.3% of reviews** | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Monetization | Free | Free |
| Best chart rank | **#95** | — |
| Size | 77 MB | 44 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Crash Test Dummy Limited, LLC](https://appshunter.io/developer/588227682) | [Office of the Secretary of Defense, Military Community and Family Policy](https://appshunter.io/developer/1532124389) |

## What reviewers say

### Navy PFA Calc

[App page](https://appshunter.io/ios/app/navy-pfa-calc/id823959487)

**Currently charting:** #95 Top Paid · Health & Fitness (US App Store)

Calculate US Navy Physical Fitness Assessments (PFA), Physical Readiness Tests (PRT), Body Composition Assessments (BCA), and Combat Fitness Tests (CFT). Supports various cardio options and includes event goal calculations with precise rounding for measurements.

**Highlights:** Supports all approved bikes, BCA calculator with 1/4 inch precision, Height/weight calculator with rounding, Saved entered values for quick recalculations, Full cardio option support, Event goal calculator, Support for users >5000ft

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use and straightforward
- 🚀 Efficient calculation of alternative cardio
- 👍 Great for personal fitness goals
- 👍 Helpful for planning PT goals for sailors
- 👍 Useful for graduating FEP and achieving scores

**What reviewers complain about**

- 📉 Bike cardio calculator inaccurate
- 🐛 Crashes frequently
- 📉 Not accurate for body fat percentage
- 🐛 Score calculator doesn't work
- 🐛 Elliptical entries return failure

**Reported bugs**

- Treadmill deleted but still testable
- Crashes to desktop
- Body fat percentage calculation off
- Score calculator not working
- Elliptical entries failing

**Requested features**

- Add developer email for issues
- Add phone number keypad for calculations
- Add 'tab' key or arrows for navigation
- Automatic calculation on 'return' key press
- Include Navy Instruction for physical readiness


### Chill Drills

[App page](https://appshunter.io/ios/app/chill-drills/id1552953408)

This app offers guided audio sessions and music designed to reduce stress, lower heart rate, and improve sleep quality. Regular use can help decrease baseline stress levels and enhance preparedness for future stressors. It includes various drills focusing on relaxation, pain relief, and sleep.

**Highlights:** Guided meditation exercises, Sleep music, Offline audio playback, Progressive muscle relaxation, Stress reduction techniques, Pain relief exercises

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

**In-app purchases:** none


## Frequently asked questions

### Is Navy PFA Calc free?

Navy PFA Calc costs $1.99, with no in-app purchases.

### Is Chill Drills free?

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

### Which has better reviews, Navy PFA Calc or Chill Drills?

Navy PFA Calc is rated higher. Navy PFA Calc averages 4.8 out of 5 from 316 ratings, while Chill Drills averages 4.4 from 21 ratings.

### Do Navy PFA Calc or Chill Drills have ads?

Neither Navy PFA Calc nor Chill Drills shows ads.

### Which is updated more often, Navy PFA Calc or Chill Drills?

Navy PFA Calc ships an update every 3 weeks, and Chill Drills every 4 months. Most recently, Navy PFA Calc was updated on October 26, 2026 and Chill Drills on October 24, 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.*