Onyx Timer vs Intervals Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Onyx Timer
This app allows users to create and manage custom workouts combining time-based and rep-based exercises. Control your workout hands-free with voice commands and receive audio cues for each exercise. Workouts can be saved and shared, with options for visual and auditory customization.
- Voice-controlled timer
- Mix time and rep-based exercises
- Audio exercise announcements
- Background operation
- Workout saving and sharing
- Customizable commands
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Onyx is a talking timer app that lets you mix time-based and rep-based exercises in the same workout. Turn on listening mode to control the timer with your voice - after you're done with those pushups, simply say "next!" to go to the next exercise. Features: • Announces exercises in Siri's voice. • Customizable voice control commands for hands-free operation. • Runs in background, or with screen locked. • Listen to music while using the timer. • Optional beep and vibrate between exercises. • Workouts are saved to iCloud, or locally if iCloud is disabled. • Swipe screen to go forward or back. • Displays exercises as a running marquee. • Highly customizable. • Mix time-based and rep-based exercises in the same workout. • Add images and notes to exercises and color-code them. • In-depth help / operating manual. • Import and export workouts via email. • Dark and light skin.
Intervals Pro
Create and follow custom interval training routines for various fitness activities. This app offers extensive customization for intervals, alerts, and goals, with seamless integration for Apple Watch and Apple Health.
- Highly customizable intervals (time/distance)
- Spoken interval names and prompts
- Standalone Apple Watch workouts
- Workout history with Apple Health
- Home screen widgets for quick launch
- Bluetooth heart rate monitor support
- Siri Shortcuts integration
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Custom Interval Training at its best for iPhone, Apple Watch and iPad. Featured by Apple and recommended by fitness instructors, personal trainers, marathon runners, and coaches. Let Intervals Pro guide you through any type of interval workout: HIIT, running, strength training, yoga, stretching, circuit training, boxing, MMA, elliptical, rehabilitation, meditation, 7-minute workouts, and many more. FEATURED BY • Apple - App of the Day in 132 Countries • Apple - Workout with Apple Watch, Quick HIIT Workouts • Women's Health Magazine • COACH Magazine • SixColors.com HIGHLIGHTS • Highly Customizable • Home Screen Widgets to quickly launch timers • Spoken interval names and prompts • Customizable alert sounds • Standalone Apple Watch workouts. Leave your iPhone at home! • Workout History using Apple Health data • View an Apple Watch workout live on your iPhone! • Run in the background with the screen locked • Play music or podcasts using the app of your choice • Bluetooth heart rate monitor support for Apple Watch or iPhone • Fill your Activity Rings • Siri Shortcuts • Share timers with friends • Time and Distance Goals • Running Pace and Heart Rate Targets • Auto pause and resume • Send completed workouts to Strava • Confetti! PERSONALIZE YOUR WORKOUT • Customize the Name, Duration, Alert, and Color for each interval • Customize Alert Sounds and Voice Prompts to guide you through your workout • Set a Countdown Alert and vibrations when the interval is about to end • Optional halfway alert • Set target heart rate ranges for each interval • Set time and distance goals FLEXIBLE INTERVAL DURATIONS • Time based (e.g., 45 seconds) • Distance-based (e.g., 0.5 MI or KM) • Count up intervals keep running until your ready for the next interval • Estimated time or distance. Count down time or distance to zero and then continue the interval, counting up until you're ready to move on. THE BEST APPLE WATCH INTERVAL TIMER • Leave your phone at home with our standalone Apple Watch app • Control your music or podcasts on the "Now Playing" screen • View an Apple Watch workout live on your iPhone • Alert Sounds and Voice Prompts to guide you through your workout • Configurable haptic alert countdown that taps you on the wrist when the interval is ending • Track heart rate, calories, distance, and pace • Route tracking for running, walking, and cycling • Workouts contribute to the Apple Watch Activity Rings WORKOUT HISTORY USING APPLE HEALTH • Intervals Pro has the best Apple Health integration of any interval training app • Track heart rate, calories, distance, and pace • Route tracking for running, walking, and cycling • Detailed stats for every interval • All your data is safely stored in Apple Health GREAT FOR RUNNING AND CYCLING • Interval duration can be set to either a specified time or distance • Display current pace, pace for the interval, or pace for the entire run • Configure heart rate ranges per interval • Analyze each interval of your run in the workout history MULTIPLE VOICES AND LANGUAGES • Select the language and voice to use for all spoken alerts. • Spoken alerts are localized to 10 languages. Chinese (simplified), Danish, Dutch, French, German, Italian, Norwegian, Polish, Spanish, and Swedish. Get Intervals Pro today, and your workouts will never be the same! SUBSCRIPTION INFO Intervals Pro is free to download and has a free timer. To create multiple timers and unlock all the features of the app, you may choose between a monthly or yearly auto-renewing subscription option. Upon confirmation of the purchase, payment will be charged to your credit card through your iTunes account. Subscription renews automatically unless canceled at least 24 hours before the end of the subscription period. Subscriptions can be managed and auto-renewal turned off in Account Settings in the App Store app. Privacy Policy and Terms of Service: https://intervalspro.com/privacy-policy.html
Screenshots
Verdict
The clearest difference is rating: Intervals Pro at 4.8 against Onyx Timer's 4.1. Intervals Pro also leads on ratings volume (14K vs 17) and review sentiment (85% vs 65%). Onyx Timer's advantage is iOS requirement (7.0 vs 17.5). On price, ads, in-app purchases and monetization model 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. Onyx Timer sells 1 one-off in-app purchase and Intervals Pro sells 8 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Intervals Pro holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: Intervals Pro has 14K ratings behind it against 17, so its average is the more settled of the two. Written reviews point the same way: 65% of Onyx Timer's written reviews are positive against 85% of Intervals Pro's.
Onyx Timer ships an update every 2 weeks, Intervals Pro weekly. The most recent releases landed on November 1, 2026 and November 10, 2026 respectively.
| Parameter | Onyx Timer | Intervals Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (17 ratings) | 4.8 (14K ratings) — better |
| Positive reviews | 65.2% of reviews | 84.5% of reviews — better |
| Number of ratings | 17 | 14K — better |
| Update frequency | Every 2 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, Apple Watch — better |
| Requires iOS | 7.0 — better | 17.5 |
| Further details — not scored | ||
| Size | 35 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Kirill Edelman | Intervals, LLC |
Customer experience
Onyx Timer
Intervals Pro
Bugs and requests
Onyx Timer
Not enough reviews yet to summarise bugs or requests.
Intervals Pro
Reported bugs
2 issues- Workout data not syncing correctly
- App crashes or freezes on certain devices
Requested features
3 requests- More customization options for interval displays
- Ability to batch delete or manage workout history
- Integration with more third-party fitness apps
In-app purchases
Onyx Timer
- Remove Ads$0.99
Intervals Pro
- Monthly Membership7 Days trial$2.991 Month
- Yearly Membership7 Days trial$19.991 Year
- Generous Tip$0.99
- Awesome Tip$1.99
- Massive Tip$4.99
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- Amazing Tip$9.99
- Intervals Pro (Legacy)$69.99
- Lifetime Access$69.99
Questions
Is Onyx Timer free?
Is Intervals Pro free?
Which has better reviews, Onyx Timer or Intervals Pro?
Do Onyx Timer or Intervals Pro have ads?
Which is updated more often, Onyx Timer or Intervals Pro?
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