Starting Strength (Legacy) vs Interval Flow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Starting Strength (Legacy)
This app guides beginners through a proven strength training program with detailed instructions, video demonstrations, and interactive logging. It simplifies tracking progress and calculating weights for exercises like squats, presses, and deadlifts.
- Beginner barbell exercise instructions
- Novice strength training program guidance
- Interactive workout logging
- Warmup and workset weight calculator
- Exercise video and photo instructions
- Cloud sync for training data
- Customizable progression
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Please note, this is the legacy version. An all new version of the Starting Strength App is on the store, search "Starting Strength Official" The Starting Strength Method is the fastest, most efficient and straightforward way to increase total body strength for complete beginners. ====== Here's some reviews from our users 5/5 "What do you get when you combine the best method to get stronger with detailed instructional videos, thorough explanations AND an actual day to day program? THIS APP! Finally! Perfect for both beginners and experienced lifters and worth much more than the price I paid for. Thank you Starting Strength! 5/5 "I've tried 2-3 other apps. I've kept paper logs. Nothing has been easier to use than this app. I couldn't figure out why I couldn't enter my warm up sets...its because you don't need to! You enter your work set weight and it tells you exactly what to load on the warmup-ups..." 5/5 "Wonderful, straight-forward way to keep DOING THE PROGRAM. A simple and clear way to apply the SS principles and track your work.” 5/5 "Like others, I was on the fence about buying this app to help kickstart my starting strength program. This app deserves it's high average rating, and you should pull the trigger if you are reading this.” 5/5 "I tried a few free apps before buying this app, this one is well worth the money. Best app out there for barbell training" ====== Mark Rippetoe's "Starting Strength" has sold over 500,000 copies worldwide and considered the most productive method in existence for anyone beginning a strength training program. "The best book ever written on strength training" - Jim Wendler, champion powerlifter. ++++++++++ Features: - Complete, easy-to-follow instructions for performing the basic barbell exercises: the squat, press, deadlift, bench press and power clean. - Walks you through the famous Starting Strength Novice Program -- shows you how to start, what weight to add and when to add extra exercises. - Enough programs to get you through the first year of training including accessory exercises of chinups and back extensions. - Designed for use at the gym with quick access to multiple angle videos and photo instructions of each exercise. - Lift instructions and diagrams from the Starting Strength Book by Mark Rippetoe. - Interactive logging tools journal your strength progression. - Warmup and workset calculator shows you exactly how many plates to put on each side of the bar. - Workset Rest Timer, customisable for each exercise. - Customise your progression for each exercise. - Add and save additional notes for each workout, and access previous notes easily. - Never lose your training data again! Cloud Sync backs up your training log data and restores it across multiple devices. - Download training log data as CSV (requires account) - Helpful hints and tutorials help you learn and progress safely. - How to program the basic exercises into the most effective program for long-term progress. - Metric (kgs) or Imperials (lbs), and change at any time. Have any comments, questions or suggestions? Please email us at hello@shabu.co Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.iubenda.com/privacy-policy/7754358
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 price: Interval Flow at Free against Starting Strength (Legacy)'s $14.99. Interval Flow also leads on update cadence (fortnightly vs every 5 weeks). Starting Strength (Legacy)'s advantage is review sentiment (83% vs 48%) and ratings volume (2.6K vs 168). On rating, ads, in-app purchases 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
Interval Flow is free to download; Starting Strength (Legacy) costs $14.99 up front. Starting Strength (Legacy) sells 8 in-app purchases, starting at $19.99 per 3 months 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.
On the App Store both sit at effectively the same score — 4.8 for Starting Strength (Legacy) against 4.7 for Interval Flow. That said, the two scores are not equally well evidenced: Starting Strength (Legacy) has 2.6K ratings behind it against 168, so its average is the more settled of the two. Written reviews are what separate them: 83% of Starting Strength (Legacy)'s written reviews are positive against 48% of Interval Flow's.
Starting Strength (Legacy) ships an update every 5 weeks, Interval Flow fortnightly. The most recent releases landed on September 26, 2026 and September 5, 2026 respectively.
| Parameter | Starting Strength (Legacy) | Interval Flow |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | 4.8 (2.6K ratings) — better | 4.7 (168 ratings) |
| Positive reviews | 82.9% of reviews — better | 48.1% of reviews |
| Number of ratings | 2.6K — better | 168 |
| Update frequency | Every 5 weeks | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Paid — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 239 MB | 20 MB |
| Age rating | 17+ | 4+ |
| Developer | Shabu Pty Ltd | Bence Kaposzta |
Customer experience
Starting Strength (Legacy)
Interval Flow
Bugs and requests
Starting Strength (Legacy)
Reported bugs
5 issues- Frequent crashes and freezes
- Issues with timer functionality
- Problems with weight and plate tracking
- Incompatibility with newer iOS versions
- Bugs when switching between exercises
Requested features
5 requests- Add ability to modify exercises and programming
- Implement advanced programming options beyond novice linear progression
- Improve stability and reduce crashes
- Add Apple Health integration
- Enhance UI and user experience
Interval Flow
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Starting Strength (Legacy)
- 3 Months Pro$19.993 Months
- Pro Quaterly$19.993 Months
- Annual Pro$39.991 Year
- Single Form Check$24.99
- Unlock Pro Forever$59.99
- 3 x Form Checks$69.99
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- 10 Form Checks$209.99
- 20 x Form Checks$399.99
Interval Flow
- 3 Month$4.993 Months
- 1 Month$9.991 Month
- 1 Month, 3 day trial3 Days trial$9.991 Month
Show 5 moreShow fewer
- 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 Starting Strength (Legacy) free?
Is Interval Flow free?
Which has better reviews, Starting Strength (Legacy) or Interval Flow?
Do Starting Strength (Legacy) or Interval Flow have ads?
Which is updated more often, Starting Strength (Legacy) or Interval Flow?
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