JumpEye vs FAST!
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
JumpEye
This app analyzes vertical jump height by calculating flight time using your device's high-speed camera. Record or import videos, mark takeoff and landing frames, and get an automatic jump height calculation. It also offers a Rebound Jump Index for continuous jumping analysis.
- Vertical jump height calculation
- Flight time measurement
- High-speed camera integration
- Video import from Photo Library
- Manual frame marking (takeoff/landing)
- Rebound Jump Index calculation
- Automatic file naming and editing
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JUMP EYE ◆Attention on using slow videos in the camera roll◆ The playback speed of slow videos saved in the camera roll will be edited to normal speed forcibly instead of slow at the beginning and the end of the video. If you load the video as it is, the playback speed at the beginning and end of the video will not be slow in JumpEye as well, so you will not be able to measure the video accurately. To fix this issue, go to the Photos app, select the video you want to import and tap the Edit button in the upper right corner of the playback screen. The barcode white lines displayed at the bottom of the video on the edit screen will be narrower at the left and right edges than at the center. By widening the spacing between the rightmost and leftmost white lines, you can slow down the playback speed of all of your videos. After editing, please load the video in JumpEye for measurement. In addition, if you can not start the camera application in JumpEye, please open the settings application and search "JumpEye" in the search window. Tap "JumpEye" in the search results, you will go to the privacy settings screen of JumpEye. After that, please give permission for all photos, microphone, camera. □General Information□ JUMP EYE has been developed to calculate the vertical jump height by using the flight time. Use your iPhone's high-speed camera to measure the flight time during a vertical jump. □Procedure□ 1. Open JUMP EYE and adjust the camera’s focus on an athlete's feet. 2. Simply record videos of a vertical jump using Slo-Mo (120/240 fps) or import the ones you want from the Photo Library. 3. Once we playback the video, we have to then manually go through frame by frame to identify and mark the takeoff and landing frames (press “start” and “stop”). 4. The formula then automatically calculates the duration of the flight and the jump height. □Main characteristics□ ・Videos are given an automatic file name (hh:mm:ss), which can be edited by holding down on the icon for one second, then we can rename or delete the file. ・After marking the frames, the jump height is automatically labelled after the file name. ・You can also import movies from the Photo Library. ・Manual focus makes feet and floor easily identifiable and precise. ・You can playback the movie in 3 ways (manual slider, frame by frame, and 10 frame mode). ・The pinch-to-zoom feature is available. ・The Rebound Jump Index (RJI) can be calculated by continuous jumping (press “RJindex”). □Note□ The equation to calculate jump height is justified only if the center of mass height is the same at takeoff and landing. Therefore, if you land on the ground in a crouched position, your jump height will be overestimated.
FAST!
This app uses AI-powered velocity-based training to help athletes and coaches manage team data, visualize movement speed, and optimize lifts. It supports various exercises and offers advanced features like motion comparison and custom tracking for detailed analysis.
- AI-powered VBT training
- Team data management
- Real-time movement speed visualization
- Motion comparison mode
- Custom tracking mode
- Supports various core and Olympic lifts
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AI-Powered VBT Training for Just $19.99/Year Unlock Elite Performance with Smart Velocity Tracking! Manage your entire team’s training data in one powerful app. Visualize movement speed in real time and optimize every lift. Supported Exercises: // Core VBT Movements // Squat Deadlift Olympic Lifts Bench Press // Advanced Features // Motion Comparison Mode Record and overlay multiple attempts to analyze subtle differences in form and velocity. Custom Tracking Mode Record any movement, select specific body parts, and monitor their speed with precision. Take your training further—whether you're coaching a team or pushing your own limits. Terms of Use: https://tnq-tech.web.app/term_of_use
Screenshots
Verdict
The clearest difference is price: FAST! at Free against JumpEye's $2.99. FAST! also leads on review sentiment (100% vs 56%) and update cadence (every 3 days vs every 2 months). JumpEye's advantage is in-app purchases (none vs 1). On ads 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
FAST! is free to download; JumpEye costs $2.99 up front. FAST! sells 1 in-app purchase, starting at $19.99 per year. JumpEye asks for nothing beyond the download.
JumpEye ships an update every 2 months, FAST! every 3 days. The most recent releases landed on September 22, 2026 and September 20, 2026 respectively.
| Parameter | JumpEye | FAST! |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 55.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid — better | Subscription |
| Devices | iPhone, iPad, Mac — better | iPhone, iPod |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 128 MB |
| Age rating | 4+ | 4+ |
| Developer | S-CADE, CORPORATION | TNQ Tech, Co. |
Customer experience
JumpEye
FAST!
In-app purchases
JumpEye
No in-app purchases
FAST!
- Yearly Plan$19.991 Year









