HIIT vs FitAssist
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HIIT
Design and track custom interval running workouts with real-time data and audio cues. This app offers detailed post-run analysis and integrates with Apple Health and Apple Watch for phone-free training.
- Customizable intervals (time, distance, open)
- Support for HIIT, tempo, fartlek, pyramid, progression workouts
- Real-time tracking of pace, cadence, heart rate
- Audio cues for guidance
- Phone-free Apple Watch operation
- Post-run analysis and GPX export
- Apple Health integration
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Tired of tapping through menus before a run? Interval Running is a simple HIIT, tabata, and interval timer - say what you want, it builds the intervals, you run. Just tell it what you want. Say something like "eight rounds, 30 seconds fast, 30 seconds easy" and the timer builds your program right then - no forms, no menus, no fields to fill in before you can start running. Prefer to build it yourself? You can: - Set work and rest by time, distance, or leave it open - Choose HIIT, tabata, fartlek, tempo, or plain run/walk intervals - Save a routine once, reuse it whenever you want Everything you need is on the screen while you run, no extra taps. - Interval, pace, cadence, and heart rate at a glance - Audio cues tell you when to switch, no need to look down - Full Apple Watch support - leave your phone at home You don't want a training plan, a coach, or a program - you want a timer that starts and stops intervals exactly when you tell it to. You want to set up a workout on the way to the track without stopping to tap through screens. You do tabata or HIIT sessions and just need something that counts rounds. You run intervals on your own terms and don't want an app deciding your pace for you. After each run, see your intervals, pace, and heart rate. Export GPX files, sync with Apple Health, and connect an external heart rate monitor if you use one. Health app integration With your permission, your interval runs count toward Activity Rings, including the Exercise and Move rings. Say it. Start it. Run. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
FitAssist
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FitAssist: Intuitive WOD Timer, Running Tracker & Workout Assistant FitAssist is your ultimate companion for timing workouts, tracking runs, and logging your fitness journey. Whether you’re crushing a WOD, jogging, or monitoring your pulse, FitAssist delivers a seamless, ad-free experience. Designed for performance, it offers an intuitive interface, real-time pulse and pace tracking, and detailed workout history. Best of all, core features are completely free, with exciting upgrades on the horizon. Key Features: - Configurable Workout Timer: Tailor it for any workout—WODs, intervals, or static moves—with count-up, count-down, or round-based options. - Running Mode: Track current and average pace, distance, and route in real-time. View splits (per km or 100m) and a running map in your workout summary. - Live Activities & Background Mode: Keep running with your phone locked or switch songs in your music player, with pace and distance updates via Live Activities. - Pulse Tracking: Monitor heart rate live using Apple Watch or fitness bands, integrated with Apple Health. - Workout History: Review past workouts with logs of time, rounds, pulse, splits, and running routes. - WOD Orientation: Built for functional fitness, with easy round tracking and interval settings. - Ad-Free: Stay focused without interruptions. - Core Features Free: Start training today at no cost. More exciting features are planned, including: - AI Workout Generator: Personalized workouts tailored to your goals, equipment, and preferences. - Pose Recognition: Real-time movement detection, automatic rep counting, and form feedback using your iPhone camera. FitAssist is your trusted fitness partner, crafted for athletes and enthusiasts who demand precision and performance.
Screenshots
Verdict
The clearest difference is in-app purchases: FitAssist at none against HIIT's 8. FitAssist also leads on update cadence (every 3 days vs every 2 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
Both are free to download. HIIT sells 8 in-app purchases, starting at $0.99 per month. FitAssist asks for nothing beyond the download.
HIIT ships an update every 2 weeks, FitAssist every 3 days. The most recent releases landed on October 6, 2026 and September 18, 2026 respectively.
| Parameter | HIIT | FitAssist |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (34 ratings) — better | — |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 34 — better | — |
| Update frequency | Every 2 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 17.0 — better | 17.1 |
| Further details — not scored | ||
| Size | 83 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Maxim Kazakov | ALEKSANDR POLEV |
In-app purchases
HIIT
- Premium Monthly Day 2$0.991 Month
- Premium Weekly7 Days trial$3.997 Days
- Premium Monthly Day 1$4.991 Month
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- Premium Monthly7 Days trial$9.991 Month
- Premium 3 Months$19.993 Months
- Premium Annual Special Offer7 Days trial$29.991 Year
- Interval Run Premium Yearly7 Days trial$59.991 Year
- Intreval Run Premium Lifetime$39.99
FitAssist
No in-app purchases









