RepSpeed vs KO Interval Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RepSpeed
This app uses your phone's camera to analyze barbell lifts, providing detailed metrics like bar path, velocity, and power. Optimize your training, improve form, and get stronger faster with advanced analytics.
- Automatic barbell detection
- Barbell path visualization
- Velocity and power metrics
- Video recording and upload
- Repetition tracking
- Workout notes
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Best barbell tracking app! Simply record a video from the side of your barbell lift to get detailed analytics such as bar path, range of motion, velocity/speed, and power. Join the tens of thousands of people using analytics to optimize their training and get stronger faster with this app! https://www.repspeed.net/ Features: Automatic barbell detection Trim video to eliminate excess time Take video with camera or upload from video on device Easily visualize repetitions over time View barbell path throughout lift Frame by frame playback Add notes to every workout Unlimited videos for analysis (premium) View time, velocity, and power for every repetition and set average (premium) RPE and One-Rep max calculation coming soon (premium) Use cases: Velocity based training - Lift in the correct velocity range. Power based training - Train to maximize power to increase vertical jump and explosiveness. Olympic Lifting - Know if failed lift was technical (didn't get under the bar fast enough) or because of strength (bar did not reach adequate height to get under) Correct form - Ensure the bar path is completely vertical, squat depth is low enough, catch is not too low during power clean, etc. User's thoughts: "I like seeing how fast I’m performing each rep for things like pause squats and more explosive Olympic lifts" "Nice way to visualize how much time you have between reps" "Let's me measure power on my lifts without having to spend lots of money" "I've never been able to measure my workouts so easily before" Privacy Policy: https://repspeed.s3.us-west-1.amazonaws.com/Privacy%20Policy.htm Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Don't waste hundreds of dollars buying inaccurate accelerometers or other bulky hardware to track the barbell. With just your phone and an inexpensive $1/month subscription, you'll have everything you need to optimize your training.
KO Interval Timer
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YOUR ROUNDS. YOUR PACE. KO Interval Timer is a flexible interval timer for boxing, HIIT, circuit training, stretching and anything else that works in rounds. Create your timer, choose your cues and keep a record of every session—all in one app. BUILD A TIMER THAT FITS Set your work and rest periods, choose the number of rounds and add a preparation countdown. Give your phases custom names, save your favourite timers and duplicate them when you want to try something different. STAY FOCUSED WITH SOUND AND VOICE Choose from a range of timer sounds, spoken countdowns and coaching voices. Personalise your start, phase-change and completion cues, with optional haptic and visual alerts to help you follow each session. KEEP A WORKOUT JOURNAL Go beyond a finish time. Add notes, a photo and tags to your completed workouts. Record how you felt before and after, rate the difficulty and optionally log your bodyweight. LOOK BACK AT YOUR PROGRESS Review your workout history, completed rounds and elapsed time. Follow your training streaks and activity over time, and revisit your journal to see what worked for you. QUICK ACCESS WITH WIDGETS AND SIRI Access saved timers through home-screen widgets and use Siri shortcuts to start a session. See useful training summaries without opening your workout history. MAKE IT YOURS Choose your accent colour, preferred sounds and coaching voice. Enable the keep-screen-awake setting to keep your timer visible during a session. YOUR JOURNAL STAYS ON YOUR DEVICE Your workout history, notes and photos are stored locally—not uploaded to our servers. No KO Interval Timer account signup is required. The app does not provide cloud backup or cross-device workout syncing. IMPORTANT TO KNOW KO Interval Timer is designed for foreground use. Keep the app open and your screen awake during sessions; it does not provide background or lock-screen timer alerts. An internet connection is needed to verify subscription access. SUBSCRIPTION REQUIRED An active subscription is required to use the timer and other protected features. Available plans, prices and billing periods are displayed before purchase. Payment is charged to your Apple account when you confirm a purchase. Subscriptions renew automatically unless cancelled before renewal under Apple’s applicable terms. You can manage or cancel your subscription in your Apple account settings. Deleting the app does not cancel your subscription. Privacy Policy: https://koappstudio.com/embed/ko-interval-timer/privacy-policy Terms of Use: https://koappstudio.com/embed/ko-interval-timer/terms-of-use
Screenshots
Verdict
The clearest difference is device support: RepSpeed at 3 against KO Interval Timer's 1. RepSpeed also leads on iOS requirement (14.0 vs 16.4). On price, ads 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. RepSpeed sells 1 in-app purchase, starting at $0.99 per month and KO Interval Timer sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
| Parameter | RepSpeed | KO Interval Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (17 ratings) — better | — |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 17 — better | — |
| Update frequency | Every 2 weeks | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 56 MB | 74 MB |
| Age rating | 4+ | 4+ |
| Developer | Sreyas Rangaraju | VAVIVA |
In-app purchases
RepSpeed
- RepSpeed Premium14 Days trial$0.991 Month
KO Interval Timer
- English$3.991 Month
- English$29.991 Year









