Comparison

GymNext Flex Timer vs Interval 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

Interval Timer

Customize your workout timing with spoken countdowns and sound cues. Build complex interval routines for various fitness activities and stay focused on your training without constantly checking the screen.

Highlights
  • Customizable interval timing
  • Spoken countdowns and sound cues
  • Support for HIIT, Tabata, and circuits
  • Adjustable sound and haptic feedback
  • Workout saving and organization
  • Offline use and background audio
Features
Read full description

Sound Cue is a custom interval timer for workouts that need more than a last-second beep. Place spoken countdowns or beep cues exactly where you need them—early enough to prepare, change equipment, reset, or breathe before the next effort. BUILD EACH PART OF YOUR WORKOUT Choose how many timed work intervals (reps) and sets you want, then time Get Ready, Work, Rest, and Between Sets independently. Build a simple round timer or use Sound Cue for HIIT, Tabata, boxing, circuits, mobility, cardio, climbing, and more. PLACE CUES WHERE YOU NEED THEM Add up to five sound cues to each workout part: Get Ready, Work, Rest, or Between Sets. For each cue, choose a beep or spoken number. Each cue can play once, every second as a countdown, or on a custom repeating schedule. Set when it begins and whether repeating cues stop after a chosen count or continue until that workout part ends. FOLLOW ALONG BY SOUND Start the timer and stay focused on your workout. Phase announcements and scheduled cues tell you when to work, rest, and reset without checking the screen. STAY IN THE FLOW • Track time remaining, the current set and rep, completion percentage, and the next interval at a glance. • Choose beep or voice alerts—or turn them off—for interval changes and workout completion. • Adjust sound volume, turn haptic feedback on or off, and choose whether cues briefly lower music or other audio. • Hear scheduled cues while your iPhone is locked or while using another app. SAVE AND ORGANIZE WORKOUTS The free library starts with three included workouts and holds up to five saved workouts in total. Rename, reorder, edit, and reuse them. Use named groups to keep related workouts together and easy to find. A one-time in-app purchase expands the limit to 100 saved workouts. PRIVATE BY DESIGN Sound Cue has no ads, analytics, or tracking. Workouts, cues, and preferences are stored locally and are not transmitted by Sound Cue. Build your intervals, press Start, and let Sound Cue keep you moving.

Screenshots

GymNext Flex Timer4 screens
Interval Timer4 screens

Verdict

The call

The clearest difference is update cadence: Interval Timer at every 2 days against GymNext Flex Timer's every 3 weeks. Interval Timer also leads on review sentiment (100% vs 72%) and rating (5.0 vs 4.8). GymNext Flex Timer's advantage is monetization model (free vs free with in-app purchases) and ratings volume (2.1K vs 4). On price, ads and in-app purchases 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 and Interval Timer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Interval Timer holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: GymNext Flex Timer has 2.1K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 72% of GymNext Flex Timer's written reviews are positive against 100% of Interval Timer's.

UpkeepUpdate frequency

GymNext Flex Timer ships an update every 3 weeks, Interval Timer every 2 days. The most recent releases landed on October 13, 2026 and October 6, 2026 respectively.

Scorecard7 real differences · 3 level
GymNext Flex Timer versus Interval Timer: the parameters behind the verdict, then further details
ParameterGymNext Flex TimerInterval Timer
PriceFreeFree
Rating4.8 (2.1K ratings)5.0 (4 ratings) — better
Positive reviews71.7% of reviews100.0% of reviews — better
Number of ratings2.1K — better4
Update frequencyEvery 3 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone
Requires iOS15.0 — better17.0
Further details — not scored
Size185 MB4 MB
Age rating4+4+
DeveloperHomick EnterprisesOctopus Software LLC

Customer experience

GymNext Flex Timer

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

Interval Timer

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

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

Interval Timer

Not enough reviews yet to summarise bugs or requests.

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
1 purchases

Interval Timer

One-time1
  • 100 Workout Upgrade$4.99

Questions

Is GymNext Flex Timer free?
GymNext Flex Timer is free to download, with in-app purchases available.
Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Which has better reviews, GymNext Flex Timer or Interval Timer?
Interval Timer is rated higher. GymNext Flex Timer averages 4.8 out of 5 from 2.1K ratings, while Interval Timer averages 5.0 from 4 ratings.
Do GymNext Flex Timer or Interval Timer have ads?
Neither GymNext Flex Timer nor Interval Timer shows ads.
Which is updated more often, GymNext Flex Timer or Interval Timer?
GymNext Flex Timer ships an update every 3 weeks, and Interval Timer every 2 days. Most recently, GymNext Flex Timer was updated on October 13, 2026 and Interval Timer on October 6, 2026.

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