Comparison

Interval Timer vs Stretch & Mobility

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Interval Timer

This app provides a customizable interval timer for running, sprints, and HIIT workouts. It offers voice and haptic cues, Apple Watch integration, and saves data to Apple Health. Choose from pre-made routines or build your own for focused training.

Highlights
  • Customizable run/walk intervals
  • Voice and haptic interval cues
  • Apple Watch control and phone-free workouts
  • Save sessions to Apple Health
  • 25+ ready-made running workouts
  • Build multi-step advanced workouts
  • Lock Screen and Dynamic Island Live Activities
Features
Read full description

Interval Run is a running interval timer for iPhone and Apple Watch. Create run/walk intervals, sprint sessions, and HIIT workouts in seconds. Train with voice announcements and haptic cues, control workouts from Apple Watch, save sessions to Apple Health, and track your workout history. Choose from 25+ ready-made running workouts or build your own. Follow intervals from the Lock Screen and Dynamic Island, and focus on your run. 25+ READY-MADE RUNNING WORKOUTS • Explore run/walk workouts, running intervals, sprints, hill repeats, tempo runs, fartlek sessions, ladders, pyramids, and more • Find workouts for speed, endurance, recovery, and different training goals • Start any workout immediately or customize it to match your training • Save your favorites to My Workouts for quick access BUILD YOUR OWN INTERVAL WORKOUT • Create simple run/walk intervals or advanced multi-step workouts • Add warm-up, running, walking, recovery, rest, and cool-down sections • Set a custom duration for every step • Repeat intervals and complete workout blocks • Add custom cues to guide you through each workout step • Build sprint, HIIT, cardio, and structured running sessions • Save multiple workouts and reuse them anytime • Preview the complete workout before you start VOICE & HAPTIC INTERVAL CUES • Hear clear voice announcements at every interval transition • Feel haptic cues when it’s time to run, walk, recover, or rest • Keep your workout active while your iPhone is locked or the app is in the background • Follow your current interval from the Lock Screen and Dynamic Island with Live Activities • Listen to music, podcasts, or audiobooks while you train RUN WITH APPLE WATCH • Sync workouts to Apple Watch • Start, pause, and control workouts directly from your wrist • Run phone-free with your workouts ready on Apple Watch • Follow interval progress without repeatedly checking your phone • Track heart rate, distance, and active energy during your workout • Get haptic interval cues directly on your Watch • Save completed workouts to Apple Health TRACK YOUR TRAINING • Browse completed workouts in calendar and history views • Review workout duration, intervals, distance, and active energy • Look back at your running and interval training over time • Share your workout results • Export and restore backups of your workout data MADE FOR RUNNERS WHO TRAIN WITH INTERVALS Whether you’re starting with beginner run/walk intervals, adding speed work to your weekly training, preparing for a 5K or another race, or creating a challenging HIIT session, Interval Run keeps every interval clear from start to finish. Use it as a simple run/walk timer, a running interval timer for speed training, an Apple Watch interval timer for phone-free workouts, or a flexible workout builder for more advanced structured sessions. From beginner run/walk workouts to sprints, tempo runs, hill repeats, fartlek training, and custom multi-step sessions, Interval Run adapts to the way you train. Start with one of 25+ ready-made workouts or create your own. Interval Run handles the timing so you can focus on your training. Some features shown, including the full workout library, advanced workout creation, multiple saved workouts, and full workout history, require Interval Run Pro. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Stretch & Mobility

Features
Read full description

Create personalised workout flows that match your goals, time, and energy. Whether you have five minutes or fifty, Stepflow helps you build routines that fit your life, not the other way around. Choose from our workouts or design your own step-by-step flows. Track your progress, celebrate your streaks, and turn fitness into a habit that feels natural and enjoyable every day. No matter where you are in your journey, starting fresh or staying consistent, Stepflow adapts to your pace. Explore beginner-friendly sessions, energising workouts, and mindful cooldowns designed to help you feel your best. With Stepflow, you’ll: Follow guided workout flows. Move anywhere, anytime, at your own rhythm. Build strength, balance, and confidence with every session. Enjoy workouts that actually feel fun and rewarding. Your journey to a healthier, happier you starts here. Step into your flow.

Screenshots

Interval Timer4 screens
Stretch & Mobility4 screens

Verdict

The call

The clearest difference is in-app purchases: Stretch & Mobility at none against Interval Timer's 3. Stretch & Mobility also leads on update cadence (every 4 days vs fortnightly) and iOS requirement (15.1 vs 26.0). On price, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Interval Timer sells 3 in-app purchases, starting at $2.99 per month. Stretch & Mobility asks for nothing beyond the download.

UpkeepUpdate frequency

Interval Timer ships an update fortnightly, Stretch & Mobility every 4 days. The most recent releases landed on November 6, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
Interval Timer versus Stretch & Mobility: the parameters behind the verdict, then further details
ParameterInterval TimerStretch & Mobility
PriceFreeFree
Rating4.5 (539 ratings) — better—
Positive reviews21.1% of reviews—
Number of ratings539 — better—
Update frequencyFortnightlyEvery 4 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS26.015.1 — better
Further details — not scored
Size17 MB104 MB
Age rating4+12+
DeveloperRoma SosnovskyMARTIN SAGAT

Bugs and requests

Interval Timer

Reported bugs

4 issues
  • Timer resets or freezes during workout
  • Prompts not working when phone is locked or in pocket
  • Unexpected interval changes or duration changes
  • Compatibility issues with music playback

Requested features

6 requests
  • Option to pause/resume timer
  • Larger time remaining display
  • Apple Watch app
  • Ability to play audio prompts even with screen off
  • More interval options (run/walk/jog)
Show 1 more
  • Congratulatory audio cue at the end

Stretch & Mobility

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Interval Timer

Subscriptions2
  • Interval Run Pro Monthly$2.991 Month
  • Interval Run Pro Annual7 Days trial$19.991 Year
One-time1
  • Full Version$2.99
None

Stretch & Mobility

No in-app purchases

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is Stretch & Mobility free?
Stretch & Mobility is free to download, with no in-app purchases.
Do Interval Timer or Stretch & Mobility have ads?
Neither Interval Timer nor Stretch & Mobility shows ads.
Which is updated more often, Interval Timer or Stretch & Mobility?
Interval Timer ships an update fortnightly, and Stretch & Mobility every 4 days. Most recently, Interval Timer was updated on November 6, 2026 and Stretch & Mobility on November 5, 2026.

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