Comparison

Gym Timer ™ vs Firefly

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

Head to head
About

Gym Timer ™

This app provides customizable timers for your workouts, including preparation, exercise, and rest periods. It offers audio cues and a set counter to keep you on track, allowing you to focus on your fitness goals without constantly checking the clock.

Highlights
  • Customizable Prepare, Start, and Rest timers
  • Set counter for tracking progress
  • Audio alerts for timer transitions
  • User-friendly interface
  • Background timer functionality (premium)
Features
Read full description

Are you tired of constantly checking the clock while you're at the gym? Gym Timer is designed to make your fitness sessions seamless and efficient, allowing you to focus solely on your fitness goals. How It Works Gym Timer consists of three essential timers to guide you through your gym session: • Prepare Timer: As soon as you hit 'Start,' the Prepare Timer kicks in. Use this time to get into position and mentally prepare for the fitness routine ahead. • Start Timer: After preparation, the Start Timer begins. This is your cue to start your exercise, whether it's lifting weights, doing squats, or any other activity. • Rest Timer: Once the Start Timer ends, the Rest Timer starts automatically. Take this time to catch your breath, hydrate, and get ready for the next set. The Start and Rest Timers will continue to alternate for the number of sets you've chosen. Once all sets are complete, Gym Timer will notify you that your gym session is finished. Features • Customizable Timers: Adjust the duration of the Prepare, Start, and Rest timers to fit your gym routine. • Set Counter: Keep track of the number of sets you've completed and how many are left. • Audio Alerts: Audible cues signal the transition between each timer, so you don't have to keep an eye on the screen. • User-Friendly Interface: The app's clean and intuitive design makes it easy to navigate, even when you're in the middle of a fitness session. Why Choose Gym Timer? • Efficiency: No more fumbling with your phone or gym equipment timers. Gym Timer streamlines your gym session, making it more efficient. • Flexibility: Whether you're a beginner or a seasoned athlete, Gym Timer is versatile enough to suit any gym routine. • Focus: With timers taking care of the timing, you can concentrate fully on your exercise, form, and technique. Download Gym Timer today and take the first step toward a more organized and effective fitness routine! Gym Timer app is free. You can use it forever, at no cost. However, Gym Timer does offer premium features for its subscribers. If you decide to purchase an upgrade, you will unlock additional features. ADDITIONAL FEATURES FOR SUBSCRIBED USERS • No Ads • Unlimited number of gym sessions per day • Keep timer active in background. The timer remains active even if you switch to another app or turn off the screen. Terms of Use: https://kociapp.github.io/Gym-Timer/term-of-use Privacy Policy: https://kociapp.github.io/Gym-Timer/privacy-policy

About

Firefly

This app uses your phone's camera to provide real-time form feedback for workouts and stretches. It offers personalized guidance, tracks progress, and helps build consistent fitness habits without extra hardware or scheduling.

Highlights
  • Real-time form feedback
  • Mobility accommodations
  • 3D movement replays
  • Personal accountability tracking
  • 7-day workout framework
  • Customizable routines
  • Gamified workouts with badges
Features
Read full description

No more being handed workouts without accountability. Firefly delivers personalized daily home workouts guided by an AI fitness coach that corrects your form in real time. Using your phone’s camera, Firefly builds real workout habits through verbal and visual cues tailored to your mobility level. We can’t see your video and we never save it, keeping your workouts 100% private for you. With Firefly, you'll get: REAL-TIME FORM FEEDBACK Your AI coach corrects your form and posture instantly, to help you avoid building bad habits. ADAPTIVE COACHING Achieve real results by pushing yourself to match the coach's form. Either let the coach adjust as you move or lock in a difficulty. PERSONAL ACCOUNTABILITY Complete your daily workout by matching the coach's form on every exercise. On HARD difficulty, only full-range, properly executed reps count. OFFLINE WORKOUT Perform your workouts on the go without the internet. REVIEW & IMPROVE See exactly what went wrong after each workout. Replay your movements with a 3D stick figure, frame by frame. No video is stored. PERSONAL INSIGHTS Track your progress with form grades, workout history, and streaks. CUSTOMIZE YOUR ROUTINE Program your own routines. Select trained exercises from our library. WORKOUT PROGRAMS Stay consistent with challenges, milestones, and rewards. SEE YOUR BEST REP MOMENT Before finishing, Firefly shows your strongest rep. Share it instantly. DAILY CHECK-INS Get reminders to work out each day and stay consistent. WORKOUT GOAL TYPES: Stay Healthy - General full-body movement workouts to keep yourself active Build Muscle - Strength training focused with mobility exercises for recovery Fat/Weight Loss - Balanced mix of workouts meant to protect your muscles as you focus on nutrition Improve Flexibility - Mix of Yoga & Pilates focused on core strength and mobility stretches More Energy & Stamina - Full body workout with cardio to increase endurance FOR COACHES, TRAINERS, PHYSICAL THERAPISTS, INSTRUCTORS Scale your coaching without adding hours to your schedule. Firefly Classroom turns your programs into an AI coach that delivers consistent 1-on-1 coaching to every client 24/7. To get in contact, visit: https://www.firefly.fitness/contact-us-business Please exercise safely and progress at your own pace. Terms of Use: https://www.firefly.fitness/terms-of-service Privacy Policy: https://www.firefly.fitness/privacy Support: https://www.firefly.fitness/contact-us

Screenshots

Gym Timer ™3 screens
Firefly4 screens

Verdict

The call

The clearest difference is review sentiment: Gym Timer ™ at 100% against Firefly's 62%. Gym Timer ™ also leads on rating (4.8 vs 4.5) and iOS requirement (15.0 vs 17.0). Firefly's advantage is ads (none vs shown) and update cadence (every 11 days vs every 6 weeks). On price, in-app purchases, monetization model and device support 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. Gym Timer ™ sells 5 in-app purchases, starting at $1.99 per 7 days and Firefly sells 10 in-app purchases, starting at $8.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Gym Timer ™ holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 28 and 130 respectively. Written reviews point the same way: 100% of Gym Timer ™'s written reviews are positive against 62% of Firefly's.

UpkeepUpdate frequency

Gym Timer ™ ships an update every 6 weeks, Firefly every 11 days. The most recent releases landed on October 10, 2026 and October 22, 2026 respectively.

Scorecard6 real differences · 4 level
Gym Timer ™ versus Firefly: the parameters behind the verdict, then further details
ParameterGym Timer ™Firefly
PriceFreeFree
Rating4.8 (28 ratings) — better4.5 (130 ratings)
Positive reviews100.0% of reviews — better61.5% of reviews
Number of ratings28130 — better
Update frequencyEvery 6 weeksEvery 11 days — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size13 MB194 MB
Age rating4+4+
DeveloperAndy SutantoBeige LLC

Customer experience

Gym Timer ™

All ratings28 ratings
Positive96.4%
Neutral0.0%
Negative3.6%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Firefly

All ratings131 ratings
Positive89.3%
Neutral1.5%
Negative9.2%
Written reviews13 reviews
Positive61.5%
Neutral7.7%
Negative30.8%

In-app purchases

5 purchases

Gym Timer ™

Subscriptions4
  • Gym & Fitness Interval Timer$1.997 Days
  • Gym & Fitness Interval Timer$3.991 Month
  • Interval Timer Pro$6.996 Months
Show 1 more
  • Fitness Timer Pro3 Days trial$19.991 Year
One-time1
  • Gym Timer Pro$39.99
10 purchases

Firefly

Subscriptions9
  • Firefly Ultra Weekly3 Days trial$8.997 Days
  • 1 Month7 Days trial$19.991 Month
  • Monthly Membership1 Month trial$19.991 Month
Show 6 more
  • Ultra 3 Month$39.993 Months
  • 6 Month7 Days trial$39.996 Months
  • 12 Month7 Days trial$119.991 Year
  • Yearly Membership7 Days trial$119.991 Year
  • Annual Members1 Month trial$119.991 Year
  • Annual Offer1 Month trial$119.991 Year
One-time1
  • Lifetime Premium$299.99

Questions

Is Gym Timer ™ free?
Gym Timer ™ is free to download, with in-app purchases available.
Is Firefly free?
Firefly is free to download, with in-app purchases available.
Which has better reviews, Gym Timer ™ or Firefly?
Gym Timer ™ is rated higher. Gym Timer ™ averages 4.8 out of 5 from 28 ratings, while Firefly averages 4.5 from 130 ratings.
Do Gym Timer ™ or Firefly have ads?
Gym Timer ™ shows ads; Firefly does not.
Which is updated more often, Gym Timer ™ or Firefly?
Gym Timer ™ ships an update every 6 weeks, and Firefly every 11 days. Most recently, Gym Timer ™ was updated on October 10, 2026 and Firefly on October 22, 2026.

Other comparisons