Race Trajectory vs SprintLens
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Race Trajectory
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Complete Track & Field Record Management ◆ NEW: Shoes Save the shoes you race in and pick them for each record. Search the running shoe catalog to add a pair with its photo and specs such as weight and drop, and see at a glance how many records you've logged in each pair. The ultimate record-keeping app for track and field athletes and running enthusiasts. Manage detailed records for every event from sprints to marathons in one comprehensive platform. Key Features: • Full World Athletics event support (100m to Marathon, Hurdles, Race Walking, Relays) • Detailed records: splits, finishing place, round, heat, lane, weather & venue • Visualize your progress with a time-progression graph • Automatic Personal Best & Yearly Best • Works offline, anytime • Siri & Shortcuts: check your personal best or add a record hands-free • iCloud backup & restore for worry-free device transfers (Premium) • Next Race: reminders before each call and at the start, with a Live Activity countdown Perfect for competitive athletes, recreational runners, and coaches. Track your progress with precision, visualize improvements, and achieve your goals. Start professional-level record management with intuitive, easy-to-use interface. Transform your training data into performance insights today! Premium is available monthly or as a one-time purchase. Both remove ads, allow up to 5 photos and videos per record, and enable iCloud backup creation. Buying lifetime access does not stop your monthly subscription from renewing. ---------- Premium Plan (Subscription) An auto-renewable monthly subscription that removes all ads, lets you attach up to 5 photos and videos per record, and backs up your data to iCloud. - Length / Price: 1 month / price shown in the app - Payment will be charged to your Apple ID account at confirmation of purchase - Subscription automatically renews unless canceled at least 24 hours before the end of the current period; your account is charged for renewal within 24 hours prior to the end of the period - You can manage or cancel your subscription anytime in your Apple ID account settings after purchase - Terms of Use (EULA): https://race-trajectory.web.app/terms/?lang=en-US - Privacy Policy: https://race-trajectory.web.app/?lang=en-US
SprintLens
This app uses two smartphones to provide accurate photo finish timing for sports like track and field and swimming. It records high-frame-rate video at the finish line, allowing for frame-by-frame review to determine precise race times without specialized equipment.
- Two-smartphone timing setup
- Start signal synchronization
- High-frame-rate finish video
- Frame-by-frame finish review
- Accurate race time measurement
- No dedicated equipment needed
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SprintLens is a photo finish timing app designed to measure times with high accuracy using just two smartphones. It is ideal for track and field, swimming, and other timed sports. Perfect for team managers, coaches, and club advisors! As a runner myself, I created this app from the perspective of athletes and team managers who want precise and flexible timing tools. Place one smartphone at the start and another at the finish. SprintLens combines the start signal with high-frame-rate video recorded at the finish, allowing you to review the exact finish moment frame by frame. It is designed to make timing more accurate and easier to understand in situations where stopping a manual stopwatch is not enough, such as sprints, swimming races, time trials, practice sessions, and school club activities. 【Key Features】 ・Measure times using two smartphones placed at the start and finish ・Timing linked with the start signal ・High-frame-rate video recording at the finish ・Frame-by-frame video review to determine the finish time ・Useful for sprints, 100m races, time trials, club activities, and practice sessions ・Create a timing setup using only smartphones, without dedicated photo finish equipment 【Recommended For】 ・Track and field and swimming practice ・Accurate timing for 100m, 200m, hurdles, and other short-distance events ・Recording practice results for teams and school clubs ・Situations where manual stopwatch timing is difficult ・Reviewing the exact finish moment on video SprintLens is designed to help you check the time from start to finish using video and synchronized timing data. ※Timing accuracy may vary depending on the device, frame rate, network environment, and recording conditions. ※This app is not guaranteed to replace official photo finish timing systems used in sanctioned competitions.
Screenshots
Verdict
The clearest difference is ads: SprintLens at none against Race Trajectory's shown. SprintLens also leads on update cadence (every 6 days vs every 3 weeks). Race Trajectory's advantage is iOS requirement (17.0 vs 26.0). On price, 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
Both are free to download. Race Trajectory sells 3 in-app purchases, starting at $0.99 per month and SprintLens sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Race Trajectory ships an update every 3 weeks, SprintLens every 6 days. Both last shipped on November 5, 2026.
| Parameter | Race Trajectory | SprintLens |
|---|---|---|
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| Update frequency | Every 3 weeks | Every 6 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 21 MB | 79 MB |
| Age rating | 4+ | 4+ |
| Developer | Tsuyoshi Matsuoka | Koki Osada |
In-app purchases
Race Trajectory
- Premium (Monthly)$0.991 Month
- Premium (Lifetime)$2.99
- Premium (Lifetime)$3.99
SprintLens
- 6-Hour Room Pass$0.29
- Lifetime Room Pass$59.99
Questions
Is Race Trajectory free?
Is SprintLens free?
Do Race Trajectory or SprintLens have ads?
Which is updated more often, Race Trajectory or SprintLens?
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