Comparison

GymNext Flex Timer vs CHALK IT PRO

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

CHALK IT PRO

This app allows gym owners, personal trainers, and athletes to create and track personalized workouts. It supports multi-level programming, private revenue-generating tracks, and community engagement features.

Highlights
  • Multi-level workout programming
  • Private revenue-generating tracks
  • Workout database
  • Community engagement features
  • Athlete progress tracking
  • Remote programming import
Features
Read full description

Chalk It Pro is the best software solution to create and track single and multi-level workouts for gym owners, personal trainers and athletes. Provide a smart, socially engaging and tailored workout experience for all your athletes! Brought on by the need to treat members and athletes individually. We allow and encourage multi-level programming on a daily basis. There is a giant need in the group/class training marketplace to make sure all clients are receiving a personalized approach. Program your daily workouts with up-to 10 levels to effectively reach all of your clients skill levels. Private tracks make it simple for gym owners to add different revenue streams and track everything from one easy to navigate dashboard. Run challenges, boot camps, skills clinics, points of performance classes and more, all while keeping them all separated and totally organized. High fives, comments, GIF's, and a daily forum allows your community to easily communicate with each other. Build a strong support group for all of your members, even those that still refuse to get on social media. Chalk It Pro & Affiliates: • Multi-Level WOD programming options for all your memebrs • Program from your PC or on-the-go • Searchable and tag-able workout database for easy cataloging and reference • Custom leader-boards through shareable private CHIP codes • Record and track WOD results, lifts and body composition history • Track and communicate with your athletes through your CoachBoard - Attendance, PR's and more... • Revenue generating Private Tracks • Community engagement though daily filterable leader-boards (high fives, GIF's, comments, Chalk Talk) • Remote programming import and distribution • Import data from other tracking apps you may have used in the past for seamless integration onto your gym. Chalk It Pro & Athletes: • Simple WOD creation and sharing tool • Import your remote coaches programming • Import your WOD history from your old tracking program • Searchable workout database for easy reference based on Name/Date/Movement Types/Etc... • Custom leader-boards through shareable private CHIP codes - Train/Compete/Compare with anyone in the world • Record and track WOD results, lifts and body composition history Chalk It Pro & Personal Trainers: • Private Tracks for each client to keep you organized and your clients set up for success • Easily copy and share programming between tracks • Program from your PC or on-the-go • Create events and groups for your clients to be involved within • Track your client results for instant coaching feedback and best of services practices A Chalk It Pro account is required. If you're downloading this app, you've chosen to subscribe to the most well rounded programming and tracking app on the market.

Screenshots

GymNext Flex Timer4 screens
CHALK IT PRO4 screens

Verdict

The call

The clearest difference is rating: GymNext Flex Timer at 4.8 against CHALK IT PRO's 4.1. GymNext Flex Timer also leads on ratings volume (2.1K vs 54) and review sentiment (72% vs 63%). CHALK IT PRO's advantage is in-app purchases (none vs 2) and update cadence (every 6 days vs every 3 weeks). On price, ads, device support and iOS requirement 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. CHALK IT PRO asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

GymNext Flex Timer holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: GymNext Flex Timer has 2.1K ratings behind it against 54, 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 63% of CHALK IT PRO's.

UpkeepUpdate frequency

GymNext Flex Timer ships an update every 3 weeks, CHALK IT PRO every 6 days. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 4 level
GymNext Flex Timer versus CHALK IT PRO: the parameters behind the verdict, then further details
ParameterGymNext Flex TimerCHALK IT PRO
PriceFreeFree
Rating4.8 (2.1K ratings) — better4.1 (54 ratings)
Positive reviews71.7% of reviews — better63.2% of reviews
Number of ratings2.1K — better54
Update frequencyEvery 3 weeksEvery 6 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size185 MB32 MB
Age rating4+4+
DeveloperHomick EnterprisesGreen Monster Studios

Customer experience

GymNext Flex Timer

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

CHALK IT PRO

All ratings54 ratings
Positive74.1%
Neutral7.4%
Negative18.5%
Written reviews19 reviews
Positive63.2%
Neutral10.5%
Negative26.3%

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

CHALK IT PRO

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

CHALK IT PRO

No in-app purchases

Questions

Is GymNext Flex Timer free?
GymNext Flex Timer is free to download, with in-app purchases available.
Is CHALK IT PRO free?
CHALK IT PRO is free to download, with no in-app purchases.
Which has better reviews, GymNext Flex Timer or CHALK IT PRO?
GymNext Flex Timer is rated higher. GymNext Flex Timer averages 4.8 out of 5 from 2.1K ratings, while CHALK IT PRO averages 4.1 from 54 ratings.
Do GymNext Flex Timer or CHALK IT PRO have ads?
Neither GymNext Flex Timer nor CHALK IT PRO shows ads.
Which is updated more often, GymNext Flex Timer or CHALK IT PRO?
GymNext Flex Timer ships an update every 3 weeks, and CHALK IT PRO every 6 days. Most recently, GymNext Flex Timer was updated on October 15, 2026 and CHALK IT PRO on October 14, 2026.

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