Comparison

NOFFS Strength 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

NOFFS Strength

This app offers a comprehensive fitness and nutrition system developed by the Navy, focusing on performance enhancement and injury prevention. It includes strength training programs, personalized fueling strategies, and recovery techniques to help users achieve their fitness goals.

Highlights
  • Strength training phases
  • Personalized caloric needs calculation
  • Meal builder and planner
  • Soft tissue release techniques
  • Flexibility routines
  • Progressive strength development
Features
Read full description

NOFFS Strength Series Developed by the Navy in partnership with EXOS (formerly Athlete’s Performance Institute), the Navy Operational Fitness and Fueling System (NOFFS) is designed to provide the Navy with a "world-class" performance training resource for Sailors, as well as Navy health and fitness professionals. Using the latest sports science methodologies, NOFFS combines both human performance and injury prevention strategies, resulting in safer training while yielding positive human performance outcomes. The exercises used in the NOFFS program are designed to replicate the activities Sailors conduct in their operational duties: lifting, pushing, pulling, and carrying. Developed as a complete fitness package, the fueling strategies allow you to determine your total caloric needs based on your personal goals, whether your desire is to lose, maintain or gain weight. The meal builder enables you to choose high-octane foods for each meal, populate your meal plan a week at a time, and email it to yourself. Finally, the regeneration component of this series will assist you with addressing and preventing common aches and pains. The soft tissue release techniques combined with the flexibility routine restores muscular balance and ensures you develop and maintain the mobility necessary for high-level performance. The Strength Series is an advanced program designed as a progression to the Operational Series. This series will assist you with developing the strength that is needed to perform at your highest level. There are three training phases within the series intended to progressively build your total work capacity and improve cardiovascular fitness. The first phase, Build Muscle, is focused on building lean muscle mass and improving your body’s capacity to handle greater physical demands through a higher volume of work. The second phase, Get Strong, focuses on building strength through fewer repetitions and higher intensity. The final phase, Get Powerful, harnesses your newfound strength and trains your muscles to be fast and forceful.

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

NOFFS Strength4 screens
Chill Drills4 screens

Verdict

The call

The clearest difference is rating: NOFFS Strength at 5.0 against Chill Drills's 4.4. NOFFS Strength also leads on review sentiment (100% vs 67%) and iOS requirement (9.0 vs 16.0). Chill Drills's advantage is update cadence (every 4 months vs every 23 months) and ratings volume (21 vs 6). On price, 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

NOFFS Strength holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 6 and 21 respectively. Written reviews point the same way: 100% of NOFFS Strength's written reviews are positive against 67% of Chill Drills's.

UpkeepUpdate frequency

NOFFS Strength ships an update every 23 months, Chill Drills every 4 months. The most recent releases landed on July 4, 2026 and September 13, 2026 respectively.

Scorecard5 real differences · 5 level
NOFFS Strength versus Chill Drills: the parameters behind the verdict, then further details
ParameterNOFFS StrengthChill Drills
PriceFreeFree
Rating5.0 (6 ratings) — better4.4 (21 ratings)
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings621 — better
Update frequencyEvery 23 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPod — betteriPhone
Requires iOS9.0 — better16.0
Further details — not scored
Size156 MB44 MB
Age rating4+4+
DeveloperCNIC HQOffice of the Secretary of Defense, Military Community and Family Policy

Customer experience

NOFFS Strength

All ratings6 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Chill Drills

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

In-app purchases

None

NOFFS Strength

No in-app purchases

None

Chill Drills

No in-app purchases

Questions

Is NOFFS Strength free?
NOFFS Strength is free to download, with no in-app purchases.
Is Chill Drills free?
Chill Drills is free to download, with no in-app purchases.
Which has better reviews, NOFFS Strength or Chill Drills?
NOFFS Strength is rated higher. NOFFS Strength averages 5.0 out of 5 from 6 ratings, while Chill Drills averages 4.4 from 21 ratings.
Do NOFFS Strength or Chill Drills have ads?
Neither NOFFS Strength nor Chill Drills shows ads.
Which is updated more often, NOFFS Strength or Chill Drills?
NOFFS Strength ships an update every 23 months, and Chill Drills every 4 months. Most recently, NOFFS Strength was updated on July 4, 2026 and Chill Drills on September 13, 2026.

Other comparisons