Navy PFA Calc vs Chill Drills
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Navy PFA Calc
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.
- 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
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*** Updated for new December 2025 BCA/CFT changes *** Best and most fully featured US Navy Physical Fitness Assessment(PFA) / Physical Readiness Test(PRT) / Body Composition Assessment (BCA) / Combat Fitness Test (CFT) iOS application. Highlights: - Supports all approved bikes according to latest Physical Readiness Program Newsletters, CFL Guides, and OPNAVINST 6110.1L. - Only BCA calculator that supporting measurements to the 1/4 inch with proper rounding performed per the CFL guide and OPNAV. - Only height/weight calculator that supports rounding and max allowed weight per OPNAVINST 6110.1L. - Entered values are saved for quick recalculations on each use of the app. - Full cardio option support (run/walk, row, swim and bike) - PRT goal calculator: See individual event PRT results needed to make a specific score with kCal/hour needed for bikes. - CFT goal calculator: See individual event CFT results needed to make a specific score - Full support for >5000ft users - Ability to save and view past assessment results to see trends over time Calculates: -BCA results (WHtR and BF%) -CFT Results -PRT results for all official options (including all supported bikes). -Individual event scores to make a user selected score. *** Not to be used for official BFA/PRT/CFT scoring *** *** This application is not officially endorsed or sponsored by the US Navy. ***
Chill Drills
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.
- Guided meditation exercises
- Sleep music
- Offline audio playback
- Progressive muscle relaxation
- Stress reduction techniques
- Pain relief exercises
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These stress relief drills can help slow your heart rate, lower your blood pressure and reduce the level of stress hormones in your body. Audio sessions include guided meditation exercises and sleep music that you can play with or without an internet connection. By doing these drills regularly, you can lower your baseline stress level and be better prepared to deal with stress in the future. Chill Drills Table of Contents 1. What’s a Chill Drill? – an overview of chill drills and how they help service members 2. Tuning In – progressive muscle relaxation exercise to help reverse the symptoms of stress 3. Releasing Stress – helps you relax by focusing on different parts of your body 4. Easing Back Pain – helps you release stress in your neck, shoulders, and back 5. Getting to Sleep – helps you fall asleep and improve the quality of your sleep 6. Music to Chill By – plays music to help you fall asleep and improve the quality of your sleep Chill Drills by Military OneSource is part of a family of apps from the War Department and Military Community and Family Policy. These apps support service members from the Army, Navy, Marine Corps, Air Force, Coast Guard, National Guard and Reserves, their spouses, immediate family members, survivors and other members of the military community. Military Community and Family Policy is the office of the DOW that addresses quality-of-life issues to help service members and their families live their best military lives. MC&FP offers a suite of programs, tools and services — including My Military OneSource and Chill Drills — that connect the military community to resources they can use every day, from relocation planning and tax services to confidential counseling and spouse employment. Download this free app today from the DOW and Military OneSource and put personalized support to work for you, anytime, anywhere.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 310 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 September 21, 2026 and September 13, 2026 respectively.
| Parameter | Navy PFA Calc | Chill Drills |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.8 (310 ratings) — better | 4.4 (21 ratings) |
| Positive reviews | 74.3% of reviews — better | 66.7% of reviews |
| Number of ratings | 310 — better | 21 |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Best chart rank | #72 — better | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 77 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | Crash Test Dummy Limited, LLC | Office of the Secretary of Defense, Military Community and Family Policy |
Customer experience
Navy PFA Calc
Chill Drills
Bugs and requests
Navy PFA Calc
Reported bugs
6 issues- Treadmill deleted but still testable
- Crashes to desktop
- Body fat percentage calculation off
- Score calculator not working
- Elliptical entries failing
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- Instructions/contact developer not navigable on older iOS
Requested features
5 requests- 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
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Navy PFA Calc
No in-app purchases
Chill Drills
No in-app purchases
Questions
Is Navy PFA Calc free?
Is Chill Drills free?
Which has better reviews, Navy PFA Calc or Chill Drills?
Do Navy PFA Calc or Chill Drills have ads?
Which is updated more often, Navy PFA Calc or Chill Drills?
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