Free replay capture; 0.1× frame analysis and comparison in Pro.
TL;DR. "Slow motion analysis app" hides three different tools: capture apps that make sure you have the moment (ReplayR), analysis apps that let you draw on it (OnForm), and delay apps that replay every rep automatically (BaM Video Delay on iOS, ReplayR Pro's delayed preview on Android). One number drives all of them: slow-motion smoothness equals capture frame rate times playback speed, so 60 fps is the floor for clean half-speed review and 120 fps for quarter speed. Pick by job, and pair a capture app with an analysis app if you do both.
ReplayR captures the moment after it happens with a rolling buffer. Free includes supported remote saves and trimming. Pro adds frame stepping, 0.1× playback, still annotations/export, comparison of two kept ReplayR clips and voiceover mixed into a confirmed edited replay. Pro delayed preview runs 5, 10, 15 or 30 seconds late on compatible Android hardware in Seamless mode. No hosted athlete account or video upload is required.
The analysis platform that absorbed Hudl Technique's users: telestration, frame stepping, side-by-side comparison, voice-over, coach-athlete threads. Subscription, billed monthly for individuals, with higher coach tiers. Record-then-analyse; needs an account. See ReplayR vs OnForm.
Continuous delayed feed, 1 second to 6 minutes of lag, up to 4 views, slow motion and pause on the feed. Every rep replays automatically with nobody touching anything; nothing is kept by default. iOS only, and unchanged for years: it is still on sale on the App Store but there is no Android build, so on Android the delayed-station job falls to a rolling-buffer app that also leaves you with clips. See ReplayR vs BaM Video Delay.
Free, offline, already installed, and the sensor's high-fps modes are excellent. But there is no buffer (you must anticipate the moment), no hands-free trigger, and no coaching review flow. Fine for one swing at the range; wrong tool for a session.
Golf and racket focused analysis with lesson management and student messaging, subscription-based and analysis-led. Overkill for sideline replay, strong for a teaching-pro workflow built around filmed lessons.
| App | Model | Slow motion | Offline / no account | Pricing |
|---|---|---|---|---|
| ReplayR | Rolling buffer + triggered save | To 0.1× + frame stepping + trim | Yes / yes | Free + pay-once Pro |
| OnForm | Record, then analyse | Frame stepping + drawing | Cloud, account required | Subscription |
| BaM Video Delay (iOS only) | Continuous delayed feed | On the feed | Yes / yes | Paid app, no Android build |
| Built-in camera | Manual record | High-fps burst modes | Yes / yes | Free |
| V1 Sports | Lesson platform | Analysis suite | Cloud, account required | Subscription |
OnForm pricing per onform.com/pricing. Store prices vary by region and promotion. Last verified 2026-07-19.
Whichever app you choose, slow motion quality is decided at capture time. Effective playback fps equals capture fps times playback speed: 30 fps footage at half speed plays at 15 effective fps and stutters, 60 fps at half speed plays at a smooth 30, and 120 fps survives quarter speed. Fast contacts (golf impact, bat on ball, a jab) deserve the highest frame rate your light allows. Run your numbers in the frame rate and slow-motion calculator.
ReplayR Pro compares two kept ReplayR clips and records coaching voiceover. Comparison exports are a paired JPEG or a muted side-by-side MP4. Overlay comparison, angle measurement, moving-video drawing and shared athlete accounts remain outside ReplayR's scope.
Follow the side-by-side comparison of two kept ReplayR clips guide to understand the output and what remains outside the app.
Choose by workflow. ReplayR offers free rolling-buffer capture and Pro frame review, still annotations, two-kept-clip comparison and voiceover with a one-time purchase. Its Pro delayed preview covers a 5–30-second drill-station feed on compatible Android hardware. Evaluate a hosted platform such as OnForm when you need athlete accounts, moving-video drawing or remote feedback threads.
60 fps is the practical minimum: it stays smooth at half speed (0.5x plays at an effective 30 fps). For quarter speed on fast actions like a golf impact or bat contact, record at 120 fps or more. At 30 fps, half speed already drops to 15 effective fps and looks choppy. Higher frame rates need more light.
It can record slow-motion bursts, and for occasional clips that is fine. What it lacks for coaching: a rolling buffer (you must start recording before the moment), a hands-free trigger, and quick in-session review tools. It fills storage with full recordings and needs someone at the phone.
ReplayR runs fully offline with no login, as does BaM Video Delay on iOS; ReplayR also keeps all saved clips on-device only. OnForm requires an account and is cloud-backed, which is part of its remote-coaching value but matters for youth footage and privacy-sensitive settings.
Rolling buffer, watch save, slow-motion review. One-time Pro unlock, no subscription.
All apps on Google Play
