Comparison

GymNext Flex Timer vs Box Timer

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

Head to head
About

GymNext Flex Timer

This app offers advanced interval training timing with customizable modes and the ability to control an external LED display. It integrates with wearables and heart rate monitors for a comprehensive workout experience.

Highlights
  • Control external LED displays
  • Multiple customizable timer modes (Tabata, EMOM, etc.)
  • Save and recall favorite workouts
  • Apple Watch control
  • Audio sync with music
  • Heart rate monitor integration
  • Control multiple LED displays
Features
Read full description

Meet the future of interval training. GymNext Flex Timer is the only timer app that combines powerful workout programming with control of large, wall-mounted LED displays—giving you the best of both worlds. Traditional gym timers rely on clunky remotes and are difficult to use. Mobile apps are flexible, but hard to see across the room. Flex Timer solves both. Build and control your workouts from your phone while displaying them on bright, easy-to-read LED screens anywhere in your gym. Perfect for HIIT, CrossFit, circuits, bootcamps, boxing, MMA, strength training, and more. Features: • Use the app on its own or connect to GymNext LED displays for maximum visibility • Core timer modes include Count Up/Down, Round, Tabata, EMOM, Mixed Intervals, and Sets with Rest • Plan your personal workouts or full classes in advance—everything ready in one tap • Share timers with athletes and trainers instantly using simple links • Save workouts to your library for quick access • Control your timer from Apple Watch—completely hands-free • Smart audio sync keeps your music and timer cues perfectly aligned • Connect multiple Bluetooth heart rate monitors and track performance in real time • Set custom heart rate zones for better training feedback • Control multiple timers across your gym at the same time • Run different workouts simultaneously for group training • Reliable Bluetooth control with no line-of-sight limitations “This will eventually become the standard for all gyms” – Garage Gym Reviews “All our coaches love the clock” – CrossFit Barrie “We love it to death” – Wolverine Strength & Conditioning Download Flex Timer and upgrade the way you train. We’re always improving. Have feedback? Reach us at support@gymnext.com

About

Box Timer

This app provides a simple, distraction-free timer designed for intense training sessions like CrossFit, HIIT, and functional fitness. It features a massive, high-contrast display, customizable interval options, and seamless audio cue integration with music apps. All workouts are automatically saved for easy tracking and reuse.

Highlights
  • Massive, high-contrast display
  • Supports AMRAP, EMOM, For Time, Tabata
  • Customizable work/rest intervals and rounds
  • Works with music apps, clear audio cues
  • Automatic workout history and reuse
  • Background operation and screen lock support
  • No ads or sign-up required
Features
Read full description

SIMPLE TIMER BUILT FOR SERIOUS TRAINING Box Timer brings the power of a CrossFit box timer to your phone. Massive display. Zero distractions. Works perfectly whether you're in the gym, at home, or training outdoors. BUILT FOR CROSSFIT, HIIT & FUNCTIONAL FITNESS From crushing WODs to HYROX training and daily circuits — Box Timer handles every workout type with a clean interface that keeps you focused on the work, not the timer. EVERY WORKOUT TYPE COVERED - AMRAP (As Many Rounds As Possible) - EMOM (Every Minute On the Minute) - For Time workouts with countdown - Tabata (20/10 protocol) - Custom intervals with work/rest periods and rounds - Count up or count down modes DESIGNED FOR VISIBILITY – Massive timer display with high-contrast text – Landscape mode for maximum size – Readable from 10+ meters away – Perfect for garage gyms and home workouts AUDIO THAT WORKS WITH YOUR MUSIC – Crystal-clear audio cues for round changes – Works seamlessly with Spotify, Apple Music, and any audio app – No interruptions to your playlist – Simple settings for audio on/off SAVE YOUR GO-TO TIMERS – Save any timer as a named preset – Load it again with one tap from the timer screen – Edit or delete presets anytime – Never set up the same workout twice ZERO FRICTION EXPERIENCE – Works in background and with screen locked – No account or sign-up required – No ads – Lightning-fast timer setup – Runs smoothly even during intense workouts GLOBAL FITNESS COMMUNITY Available in English, Swedish, German, Spanish, Polish, French, and Japanese WHY ATHLETES CHOOSE BOX TIMER "This app is a must have for CrossFit workouts. Ideal for emoms, amraps and for time workouts. I even use it for strength work like squats by programming beeps for 45 seconds work and 2 minutes rest. And it’s free! I mean come on." Whether you're an elite athlete or just starting your fitness journey, Box Timer delivers exactly what you need: a powerful, distraction-free timer that stays out of your way. Get it now and experience the difference.

Screenshots

GymNext Flex Timer4 screens
Box Timer4 screens

Verdict

The call

The clearest difference is in-app purchases: Box Timer at none against GymNext Flex Timer's 2. Box Timer also leads on review sentiment (93% vs 72%). GymNext Flex Timer's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 18). On price, rating, ratings volume and update cadence 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. GymNext Flex Timer sells 2 in-app purchases, starting at $8.99 per month. Box Timer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for GymNext Flex Timer against 4.9 for Box Timer. Both are backed by a comparable volume of ratings — 2.1K and 2.9K respectively. Written reviews are what separate them: 72% of GymNext Flex Timer's written reviews are positive against 93% of Box Timer's.

UpkeepUpdate frequency

GymNext Flex Timer ships an update every 3 weeks, Box Timer monthly. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.

Scorecard4 real differences · 6 level
GymNext Flex Timer versus Box Timer: the parameters behind the verdict, then further details
ParameterGymNext Flex TimerBox Timer
PriceFreeFree
Rating4.8 (2.1K ratings)4.9 (2.9K ratings) — better
Positive reviews71.7% of reviews93.2% of reviews — better
Number of ratings2.1K2.9K — better
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad
Requires iOS15.0 — better18
Further details — not scored
Size185 MB7 MB
Age rating4+4+
DeveloperHomick EnterprisesEdvin Linden

Customer experience

GymNext Flex Timer

All ratings2,119 ratings
Positive96.6%
Neutral1.1%
Negative2.4%
Written reviews173 reviews
Positive71.7%
Neutral6.4%
Negative22.0%

Box Timer

All ratings2,916 ratings
Positive96.9%
Neutral1.5%
Negative1.6%
Written reviews132 reviews
Positive93.2%
Neutral0.0%
Negative6.8%

User reviews

GymNext Flex Timer

From 2.1K App Store ratings

What we love

  • 🚀 Versatile and customizable
  • 👍 User-friendly interface
  • 🔔 Reliable and consistent
  • 💪 Excellent for interval training
  • 🔊 Clear audio cues

Room to improve

  • 🐛 Audio cues sometimes stop working
  • 🔊 Lack of volume control
  • 🔍 Detailed instructions needed for beginners
  • ⏱️ Delayed countdown between phone and timer

Box Timer

From 2.9K App Store ratings

What we love

  • 🚀 Simple and straightforward
  • 🔒 No ads or subscriptions
  • 👍 Intuitive and easy to use
  • 👍 Excellent for home workouts
  • 👍 Minimalistic and focused design

Room to improve

  • 🐛 Issues with UI and timer controls on some devices
  • 🐛 Lack of sound options or countdown beeps
  • 🐛 Inability to adjust times without resetting the workout

Bugs and requests

GymNext Flex Timer

Reported bugs

2 issues
  • Saved timers not consistently loading
  • Segmented timers not saving properly

Requested features

4 requests
  • Watch app integration for remote control
  • Background audio playback when app is closed
  • Customizable voice options
  • Lap timer functionality

Box Timer

Reported bugs

3 issues
  • Timer not functioning properly in landscape mode
  • Review prompt interfering with timer operation
  • Compatibility issues on certain iPad models

Requested features

4 requests
  • Round count display during rest periods
  • Customizable countdown beeps or sounds
  • Ability to save and load custom timer settings
  • Apple Watch app support

In-app purchases

2 purchases

GymNext Flex Timer

Subscriptions2
  • Flex Timer Pro Monthly7 Days trial$8.991 Month
  • Flex Timer Pro Yearly1 Month trial$79.991 Year
None

Box Timer

No in-app purchases

Questions

Is GymNext Flex Timer free?
GymNext Flex Timer is free to download, with in-app purchases available.
Is Box Timer free?
Box Timer is free to download, with no in-app purchases.
Which has better reviews, GymNext Flex Timer or Box Timer?
Box Timer is rated higher. GymNext Flex Timer averages 4.8 out of 5 from 2.1K ratings, while Box Timer averages 4.9 from 2.9K ratings.
Do GymNext Flex Timer or Box Timer have ads?
Neither GymNext Flex Timer nor Box Timer shows ads.
Which is updated more often, GymNext Flex Timer or Box Timer?
GymNext Flex Timer ships an update every 3 weeks, and Box Timer monthly. Most recently, GymNext Flex Timer was updated on September 30, 2026 and Box Timer on September 29, 2026.

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