Comparison

Navy PFA Calc vs Chill Drills

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

*** 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. ***

About

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.

Highlights
  • Guided meditation exercises
  • Sleep music
  • Offline audio playback
  • Progressive muscle relaxation
  • Stress reduction techniques
  • Pain relief exercises
Features
Read full description

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

Navy PFA Calc4 screens
Chill Drills4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 6 level
Navy PFA Calc versus Chill Drills: the parameters behind the verdict, then further details
ParameterNavy PFA CalcChill Drills
Price$1.99Free — better
Rating4.8 (310 ratings) — better4.4 (21 ratings)
Positive reviews74.3% of reviews — better66.7% of reviews
Number of ratings310 — better21
Update frequencyEvery 3 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
Best chart rank#72 — better—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.016.0 — better
Further details — not scored
Size77 MB44 MB
Age rating4+4+
DeveloperCrash Test Dummy Limited, LLCOffice of the Secretary of Defense, Military Community and Family Policy

Customer experience

Navy PFA Calc

All ratings310 ratings
Positive96.8%
Neutral1.6%
Negative1.6%
Written reviews35 reviews
Positive74.3%
Neutral8.6%
Negative17.1%

Chill Drills

All ratings21 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

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
Show 1 more
  • 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

None

Navy PFA Calc

No in-app purchases

None

Chill Drills

No in-app purchases

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 310 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 September 21, 2026 and Chill Drills on September 13, 2026.

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