TimerFlex vs Interval Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TimerFlex
This app uses AI to instantly create custom workout timers from whiteboard photos or text descriptions. It offers various pre-built formats, real-time heart rate tracking, and detailed workout history. Advanced features like Apple Watch sync and unlimited AI generation are available with a subscription.
- AI workout generation from photos/text
- Apple Watch sync with haptic cues
- Real-time heart rate and calorie tracking
- 5 purpose-built workout formats (For Time, AMRAP, EMOM, Tabata, Custom)
- 1RM calculator
- Voice coach and audio cues
- Workout history and monthly stats
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TIMERFLEX – INTERVAL & WOD TIMER The smartest workout timer for serious athletes. Snap a photo of any whiteboard. Describe your session in plain text. TimerFlex builds the entire workout — rounds, intervals, rest — instantly with AI. ——— AI WORKOUT GENERATOR Point your camera at a gym whiteboard or type your workout. AI reads it and sets up the complete timer in seconds. No programming. No fumbling. Just press go. APPLE WATCH SYNC Full timer on your wrist the moment you start. See rounds, phases, and time remaining without touching your phone. Haptic cues keep you on pace. Start and pause from your wrist. REAL-TIME HEART RATE & CALORIES Live BPM and active energy during every session via HealthKit. Know exactly how hard you're working without leaving the timer. 5 PURPOSE-BUILT FORMATS Not a generic countdown. Each format knows exactly what it's doing: • For Time — race the clock, finish as fast as possible • AMRAP — maximum rounds in a fixed window • EMOM — new movement every minute, automatically • Tabata — 20s work, 10s rest, 8 rounds, handled • Custom — chain any combination into one session No manual resets. No counting rounds in your head. TimerFlex handles all of it. 1RM CALCULATOR Built into every setup screen. Enter your max and get instant percentage breakdowns for every lift. VOICE COACH & AUDIO CUES Countdown calls, phase announcements, halfway alerts. Eyes on your reps, not your screen. LARGE DISPLAY & LANDSCAPE MODE Numbers big enough to read from across the gym. Rotate for maximum visibility mid-set. WORKOUT HISTORY & MONTHLY STATS Every session logged automatically with mood, duration, and notes. Monthly Wrapped gives you your longest streak, total time, and favorite format so you can see your training compound over time. SAVE, FAVORITE & REBUILD Save any workout as a template. Favorite your go-to sessions. Retry any past workout in one tap. NOTES & PHOTO ATTACHMENTS Attach whiteboard photos or text notes to any session. Your workout context, always with your data. EXPORT & BACKUP Export your full history as CSV or JSON. Your data, your way, always portable. ——— BUILT FOR • CrossFit WODs & box sessions • HYROX training blocks • HIIT & interval circuits • Tabata (20s work / 10s rest) • EMOM (Every Minute on the Minute) • AMRAP (As Many Rounds As Possible) • Home gym, garage & travel workouts • Benchmark WODs: Murph, Cindy, Fran ——— TIMERFLEX PRO Unlock unlimited AI Generator, Custom Workout Builder, premium voices and sounds, heart rate insights, Monthly Wrapped, photo notes, workout export, Apple Watch sync, and zero ads. Monthly · Quarterly · Annual — your choice. ——— Privacy Policy: https://plainworks.co/timerflex/privacy-policy Terms of Use: https://plainworks.co/timerflex/terms
Interval Timer
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Interval Timer for HIIT, Tabata & Circuit Training Interval Timer: Workout HIIT is a powerful and flexible interval timer designed for effective workouts at home, in the gym, or outdoors. Perfect for HIIT, Tabata, CrossFit, running, boxing, strength training, yoga, and breathing exercises. Customize your workout and focus entirely on your performance. Create Your Own Workouts • Set work and rest intervals • Add unlimited rounds • Insert breaks between exercises • Save and edit your custom programs Whether it's 20 seconds of work and 10 seconds of rest (Tabata) or a complex multi-level routine — everything is easy to configure in seconds. Stay Consistent & Track Progress • Track workouts in the calendar • Plan your sessions • Get workout reminders Stay consistent and never miss a training session. Maximum Focus • Large, easy-to-read display • Clear sound alerts and vibration See only what matters — the timer and the current interval. Perfect For: HIIT • Tabata • CrossFit • Running • Boxing • Circuit Training • Yoga • Breathing Exercises • Home Workouts • Gym Training Interval Timer: Workout HIIT is a simple, reliable, and effective tool to help you reach your fitness goals. Train smarter. Train better. Your subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current subscription period. Your iTunes will automatically be charged at the same price for renewal, as stated above, within 24 hours prior to the end of the current subscription period. You can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase. Privacy Policy: https://sites.google.com/view/dfkbndjkbnrjt/privacy-policy Terms of use: https://sites.google.com/view/sdvskdmvl/terms-of-use
Screenshots
Verdict
The clearest difference is update cadence: TimerFlex at weekly against Interval Timer's every 2 months. Interval Timer's advantage is iOS requirement (15.6 vs 26.0). On price, ads, in-app purchases 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
Both are free to download. TimerFlex sells 7 in-app purchases, starting at $1.49 per 7 days and Interval Timer sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
TimerFlex ships an update weekly, Interval Timer every 2 months. The most recent releases landed on September 21, 2026 and September 16, 2026 respectively.
| Parameter | TimerFlex | Interval Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Weekly — better | Every 2 months |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Apple Watch — better | iPhone, iPod |
| Requires iOS | 26.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 79 MB | 13 MB |
| Age rating | 12+ | 4+ |
| Developer | Plainworks Teknoloji Limited Sirketi | Andrei Dziahel |
In-app purchases
TimerFlex
- Weekly subscription$1.497 Days
- TimerFlex Monthly$3.491 Month
- 3 Months subscription$8.493 Months
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- TimerFlex Annual Offer$12.991 Year
- TimerFlex Annual3 Days trial$24.991 Year
- Ad-Free$0.99
- TimerFlex Lifetime$34.99
Interval Timer
- Interval Timer PRO3 Days trial$3.991 Month
- Interval Tabata Timer3 Days trial$3.997 Days
- Interval Timer PRO$24.99
Questions
Is TimerFlex free?
Is Interval Timer free?
Do TimerFlex or Interval Timer have ads?
Which is updated more often, TimerFlex or Interval Timer?
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