Comparison

GymNext Flex Timer vs Spark Kiosk

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

Spark Kiosk

This app transforms an iPad into a dedicated attendance management system. It allows students to quickly check in and view important announcements. Instructors can manage rosters, attendance, and student information securely.

Highlights
  • Student check-in
  • Event announcements
  • Light/Dark mode
  • Instructor Mode for management
  • Roster and attendance tracking
  • Guardian notifications
  • Student profile picture uploads
Features
Read full description

Elevate your attendance management with the Spark Kiosk app, turning your iPad into a standalone attendance solution. Students breeze through check-ins in seconds, while staying informed with the latest events and announcements displayed between check-ins. Experience Personalized Viewing with Light/Dark Mode Enjoy a sleek, user-friendly interface with Light and Dark modes, offering a personalized experience tailored to any lighting scenario. Effortless Instructor Mode for Management Control Introducing Instructor Mode! Perform all management tasks directly from your kiosk. Activate it securely with a PIN code, granting exclusive access to essential management features. Efficiency at Your Fingertips: Roster and Attendance Management From effortless scheduling in Instructor Mode to comprehensive roster management, handle additions, deletions, and updates seamlessly. Review class attendance at a glance or drill down to individual student records effortlessly. Guardian Notifications for Check-In/Check-Out Ensure safety and peace of mind with our Check-In/Check-Out feature. Keep guardians informed about pick-ups, offering reassurance and timely notifications. Personalize Student Profiles with Picture Uploads Empower students to add a touch of identity by uploading their pictures, creating a personalized experience within the app. -------------------------------------- If you have any feedback or questions, please go to Spark Kiosk > Settings > Feedback

Screenshots

GymNext Flex Timer4 screens

Verdict

The call

The clearest difference is in-app purchases: Spark Kiosk at none against GymNext Flex Timer's 2. Spark Kiosk also leads on iOS requirement (13.0 vs 15.0). GymNext Flex Timer's advantage is ratings volume (2.1K vs 34) and device support (4 vs 1). On price, rating, review sentiment 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. Spark Kiosk 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 4.7 for Spark Kiosk. That said, the two scores are not equally well evidenced: GymNext Flex Timer has 2.1K ratings behind it against 34, so its average is the more settled of the two. Written reviews are what separate them: 72% of GymNext Flex Timer's written reviews are positive against 67% of Spark Kiosk's.

UpkeepUpdate frequency

GymNext Flex Timer ships an update every 3 weeks, Spark Kiosk monthly. The most recent releases landed on October 18, 2026 and October 10, 2026 respectively.

Scorecard4 real differences · 6 level
GymNext Flex Timer versus Spark Kiosk: the parameters behind the verdict, then further details
ParameterGymNext Flex TimerSpark Kiosk
PriceFreeFree
Rating4.8 (2.1K ratings) — better4.7 (34 ratings)
Positive reviews71.7% of reviews — better66.7% of reviews
Number of ratings2.1K — better34
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Apple Watch — betteriPad
Requires iOS15.013.0 — better
Further details — not scored
Size185 MB82 MB
Age rating4+9+
DeveloperHomick EnterprisesSpark Membership 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%

Spark Kiosk

All ratings34 ratings
Positive94.1%
Neutral0.0%
Negative5.9%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

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

Spark Kiosk

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
None

Spark Kiosk

No in-app purchases

Questions

Is GymNext Flex Timer free?
GymNext Flex Timer is free to download, with in-app purchases available.
Is Spark Kiosk free?
Spark Kiosk is free to download, with no in-app purchases.
Which has better reviews, GymNext Flex Timer or Spark Kiosk?
GymNext Flex Timer is rated higher. GymNext Flex Timer averages 4.8 out of 5 from 2.1K ratings, while Spark Kiosk averages 4.7 from 34 ratings.
Do GymNext Flex Timer or Spark Kiosk have ads?
Neither GymNext Flex Timer nor Spark Kiosk shows ads.
Which is updated more often, GymNext Flex Timer or Spark Kiosk?
GymNext Flex Timer ships an update every 3 weeks, and Spark Kiosk monthly. Most recently, GymNext Flex Timer was updated on October 18, 2026 and Spark Kiosk on October 10, 2026.

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