JumpEye vs BuildUP
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.
BuildUP
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BuildUP は「続けやすさ」にこだわった、シンプルな筋トレ記録アプリです。 広告なし・アカウント登録なし・オフライン対応。あなたの記録はすべて端末の中だけに保存されます。 ■ こんな人に ・ジムや自宅トレの記録を手軽に残したい ・アプリが複雑すぎて続かなかった ・重量や回数の伸びをグラフで確認してモチベを上げたい ■ 主な機能 ・種目を選んでセット(重量×回数)を記録 ・自重種目(回数)、時間・距離の種目にも対応 ・同じ日のトレーニングは自動で1日分にまとまる ・履歴から過去のトレーニングをかんたん振り返り ・進捗グラフ(最大重量/推定1RM/ボリューム) ・体重・体組成(体脂肪率・筋肉量など)の記録と推移グラフ ・記録忘れを防ぐリマインド通知 ・トレーニング成果を画像でシェア ■ プライバシー データは端末内にのみ保存され、外部に送信されません。 アカウント登録も不要です。 まずは今日の1種目から。BuildUP と一緒に積み上げていきましょう。
Screenshots
Verdict
The clearest difference is price: BuildUP at Free against JumpEye's $2.99. BuildUP also leads on update cadence (every 5 days vs every 2 months) and iOS requirement (13.0 vs 16.6). On 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
BuildUP is free to download; JumpEye costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
JumpEye ships an update every 2 months, BuildUP every 5 days. The most recent releases landed on October 24, 2026 and September 25, 2026 respectively.
| Parameter | JumpEye | BuildUP |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 55.6% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Requires iOS | 16.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | 株式会社S-CADE | SHUNYA KAMATA |
In-app purchases
JumpEye
No in-app purchases
BuildUP
No in-app purchases









