HIIT Workout Timer by Zafapp vs Interval Flow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HIIT Workout Timer by Zafapp
This app helps you create custom interval training routines with adjustable sets, rounds, and exercise times. It also tracks your workout history, calculates calorie burn, and integrates with Apple Watch for heart rate monitoring and workout control.
- Custom interval timers (HIIT, Tabata)
- Reps and weight logging
- Workout routine planner
- Calorie burn calculation
- Workout history and analysis
- Apple Watch integration
- Background music control
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More than one trillion calories are burned using this app! INTERVAL TIMER (HIIT AND TABATA) & REPS AND WEIGHT LOGGER • Custom number of Sets and Rounds, and Exercise, Rest, Warm Up and Cool Down times • High intensitiy - Low intensity time reminders • Set Reps and Weight for each exercise (e.g. 20 squats with 25 lbs) • Text-to-speech interval change sound • Also perfect for weight lifting exercises WORKOUT ROUTINE & PLANNER • Set workout days for each workout plan • Create routines with 30+ exercises including squats, crunches and weight lifting... • Get reminders on workout day and time • Add more exercises with custom exercise naming CALORIE COUNTER & WORKOUT HISTORY • Calorie burns calcuated for each workout session • Workout history with daily, weekly, and monthly highlights • Detailed analyzes of your last workouts APPLE WATCH APP & HEART RATE MONITOR • Start and control workouts right on your watch • Monitor your heart rate coming from your Apple Watch • Log your workout history to Apple Health BACKGROUND MUSIC WITH VOLUME CONTROL • Listen and control Apple Music songs right on the app • Control background music volume (50%-100%)
Interval Flow
This app revolutionizes fitness routines with deep customization and advanced tracking for various activities like HIIT, Yoga, and CrossFit. It allows users to create, share, and follow personalized workouts with features like color-coded intervals, real-time progress tracking, and voice assistance.
- Color-coded intervals
- Customizable circuits
- Real-time progress tracking
- Voice assist and search
- Exercise library
- Workout sharing
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Interval Flow: Experience a Workout Revolution Interval Flow is your ultimate fitness companion, designed to transform your workout experience with deep customization and advanced tracking. This versatile app is perfect for a wide range of activities including HIIT, TABATA, CrossFit, Yoga, Pilates, Meditation, and more. With Interval Flow, you can stay focused on your fitness goals while the app handles the details. Key Features: - Color-Coded Intervals: Customize your workout visually with color-coded intervals. Set distinct colors for warm-ups, high-intensity bursts, rest periods, and more, to easily navigate through your routine. - Exercise Library: Build your workouts with ease! Add new exercises or select from the existing ones to tailor your workout to your specific needs. - Real-Time Progress Tracking: Keep a live tab on your workout progress. The dynamic interval list updates in real-time, ensuring you know exactly where you are in your routine. - Customizable Circuits: Create the perfect workout sequence by arranging various exercises into repeatable circuits tailored to your fitness level and goals. - Personalized Interval Warnings: Get timely alerts before an interval ends. Customize the warning sounds to suit your style, ensuring smooth transitions without missing a beat. - Interactive Workflow: Enjoy crafting your workouts with a user-friendly interface that’s as intuitive as it is functional. Setting up your ideal workout regime is now as engaging as the workout itself. - Voice Assist: Let our advanced voice assist guide you through your exercises, announcing what’s next so you can remain focused on your form and intensity. - Voice Search: Quickly find your favorite workouts using voice commands, making your preparation seamless and hands-free. - AirShare: Share your custom workouts with friends or clients effortlessly using AirDrop, enhancing connectivity and interaction. Why Choose Interval Flow? With Interval Flow, you don't just exercise, you experience a revolution in workout efficiency and enjoyment. The app’s intuitive interface and comprehensive customization options make it the optimal companion for anyone serious about fitness. Whether you're powering through a high-intensity session or seeking tranquility in yoga, Interval Flow adapts to your pace and preference. Unlock your potential with Interval Flow – where your workout meets innovation. Interval Flow Subscription: The app includes a 1 month long auto-renewable subscription with a 3-day free trial, which will unlock premium features, like unlimited workouts, timer program editing and autoplay and costs $4.99/ month. It will be charged to your credit card through your iTunes account and will automatically renew unless you canceled at least 24 hours before the end of the current period. Any unused portion of a free trial period will be forfeited when you purchase the subscription. Though your subscription for the current month cannot be canceled, you can turn auto-renewal off in your account settings after purchase. See the instructions here: https://support.apple.com/en-us/HT202039 You can read the terms of use and privacy policy here: https://kapi90.github.io/hiit_timer_privacy_policy.html End User License Agreement (EULA) of the App Store applies: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is monetization model: HIIT Workout Timer by Zafapp at free with in-app purchases against Interval Flow's subscription. HIIT Workout Timer by Zafapp also leads on device support (4 vs 2) and iOS requirement (15.0 vs 18.6). Interval Flow's advantage is ads (none vs shown) and rating (4.7 vs 4.5). On price, update cadence 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
Both are free to download. HIIT Workout Timer by Zafapp sells 3 one-off in-app purchases and Interval Flow sells 10 in-app purchases, starting at $4.99 per 3 months. Whichever you choose, the download price is not the number that matters.
Interval Flow holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: Interval Flow has 168 ratings behind it against 15, so its average is the more settled of the two. Written reviews point the same way: 40% of HIIT Workout Timer by Zafapp's written reviews are positive against 48% of Interval Flow's.
HIIT Workout Timer by Zafapp ships an update every 3 weeks, Interval Flow fortnightly. The most recent releases landed on August 23, 2026 and September 5, 2026 respectively.
| Parameter | HIIT Workout Timer by Zafapp | Interval Flow |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (15 ratings) | 4.7 (168 ratings) — better |
| Positive reviews | 40.0% of reviews | 48.1% of reviews — better |
| Number of ratings | 15 | 168 — better |
| Update frequency | Every 3 weeks | Fortnightly — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Subscription |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 96 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Cuneyt Zafer | Bence Kaposzta |
Customer experience
HIIT Workout Timer by Zafapp
Interval Flow
In-app purchases
HIIT Workout Timer by Zafapp
- Pro Version$1.99
- Pro Version$10.99
- Pro Version$11.99
Interval Flow
- 3 Month$4.993 Months
- 1 Month$9.991 Month
- 1 Month, 3 day trial3 Days trial$9.991 Month
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- Annual7 Days trial$14.991 Year
- 1 Year discounted$25.951 Year
- 1 Year, 3 day trial3 Days trial$39.991 Year
- 1 Year$39.991 Year
- 1 Year Intro month1 Month trial$39.991 Year
- Free Lifetime subscriptionFree
- Lifetime$24.99
Questions
Is HIIT Workout Timer by Zafapp free?
Is Interval Flow free?
Which has better reviews, HIIT Workout Timer by Zafapp or Interval Flow?
Do HIIT Workout Timer by Zafapp or Interval Flow have ads?
Which is updated more often, HIIT Workout Timer by Zafapp or Interval Flow?
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