Comparison

Interval Timer vs Fortify Training

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

Head to head
About

Interval Timer

Organize your running and high-intensity interval training sessions with ease. Quickly set up custom time intervals for running, walking, warm-ups, and cool-downs. Receive voice and vibration notifications for interval changes, and enjoy background music playback.

Highlights
  • Intuitive design
  • Customizable time intervals
  • Warm-up and cool-down timers
  • Voice and vibration notifications
  • Background music support
  • Foreground/background operation
Features
Read full description

Choose from 25+ ready-made running workouts—or build custom run-walk intervals, HIIT sessions, and cardio workouts in seconds. Customize every step, duration, and repeat cycle, then train with voice announcements and haptic cues. Control workouts from Apple Watch, save completed sessions to Apple Health, and review your workout history. Choose a workout, tailor it if you want, hit Start, and focus on your training—not the clock. EXPLORE 25+ READY-MADE WORKOUTS • Find run-walk sessions, interval runs, sprints, hill repeats, tempo workouts, and more • Choose from curated workouts for different training styles and goals • Start any workout as-is or customize it to fit your training • Save your favorites to My Workouts for quick access BUILD ADVANCED CUSTOM WORKOUTS • Create multi-step workouts with timed intervals and recovery periods • Add warm-up, running, walking, rest, and cool-down sections • Set a duration for each step and repeat cycles for interval blocks • Add custom cues to guide you through each step • Build anything from simple run-walk intervals to advanced training sessions • Save multiple workouts for quick access • Preview your complete workout before you start STAY IN THE FLOW • Hear clear voice announcements at every interval transition • Feel haptic cues when it’s time to change pace • Keep your workout active while your iPhone is locked or the app is in the background • Listen to music, podcasts, or audiobooks while you train TRAIN WITH APPLE WATCH • Sync your workouts to Apple Watch • Start, control, and monitor workouts directly from your wrist • Train phone-free with workouts ready on your Watch • Track heart rate, distance, and active energy during your workout • Save completed workouts to Apple Health TRACK YOUR PROGRESS • Browse completed workouts in calendar and history views • Review duration, intervals, distance, and active energy • Follow your training over time • Share your workout results • Export and restore backups of your workout data BUILT FOR EVERY WORKOUT Whether you’re starting a beginner run-walk program, adding speed intervals, preparing for a race, or building a focused HIIT session, Interval Run gives you the flexibility to train your way. Start with one of 25+ ready-made workouts or build your own from scratch. 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

Fortify Training

Read full description

Worldwide coaching for Lifestyle Nutrition and Workout Programs. At Fortify Training, we understand that everyone is different. But the one thing that we can all agree on that can help you reach your goal, is consistency. Finding a balanced Nutrition plan and Workout program will allow you to enjoy your journey and keep you motivated to become your strongest and best self. Our Programs include - Customized Nutrition - Macros* Customized Nutrition - Meal Plan* Online Gym Training* Online Home Workout Training* 6 Week Summer Shred 30 Day Reset Nutrition Program *Requires a 3 month minimum, program renews month to month after the minimum with a 30 day notice required to discontinue. Terms of use: https://kahunas.io/terms-conditions Privacy policy: https://kahunas.io/privacy

Screenshots

Interval Timer4 screens
Fortify Training3 screens

Verdict

The call

The clearest difference is device support: Interval Timer at 3 against Fortify Training's —. Fortify Training's advantage is iOS requirement (15.0 vs 26.0). On price and in-app purchases 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 and Fortify Training sells 1 in-app purchase, starting at $149.00 per month. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 8 level
Interval Timer versus Fortify Training: the parameters behind the verdict, then further details
ParameterInterval TimerFortify Training
PriceFreeFree
Rating4.5 (534 ratings) — better—
Positive reviews21.1% of reviews—
Number of ratings534 — better—
Update frequencyEvery 3 months—
AdsNo—
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple Watch — better—
Requires iOS26.015.0 — better
Further details — not scored
Size15 MB44 MB
Age rating4+17+
DeveloperRoma SosnovskyFortify Training LLC

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

Fortify Training

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
1 purchases

Fortify Training

Subscriptions1
  • Customized Nutrition$149.001 Month

Questions

Is Interval Timer free?
Interval Timer is free to download, with in-app purchases available.
Is Fortify Training free?
Fortify Training is free to download, with in-app purchases available.

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