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). 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.
Rolling buffer (45 s free, up to 12 min Pro), save after the moment by phone, Wear OS watch, or open-palm gesture, then trim and play at 0.5× or 0.25× right on the court. Fully offline, no account, clips stay on-device. Free with a one-time Pro unlock. No drawing tools, by design. Android and Wear OS.
The analysis platform that absorbed Hudl Technique's users: telestration, frame stepping, side-by-side comparison, voice-over, coach-athlete threads. Subscription, from $9.99 per month for individuals, coach plans up to $59.99 per month. 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 and Android. 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 | 0.5× / 0.25× + trim | Yes / yes | Free + pay-once Pro |
| OnForm | Record, then analyse | Frame stepping + drawing | Cloud, account required | From $9.99/mo |
| BaM Video Delay | Continuous delayed feed | On the feed | Yes / yes | Paid app, see store |
| 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.
There is no single winner because the category hides three different tools. For capturing training moments and reviewing them in slow motion on the spot, ReplayR (rolling buffer, free tier, pay-once Pro). For drawing, side-by-side comparison, and remote coaching, OnForm (subscription, from $9.99 per month). For an automatic delayed feed at a drill station, BaM Video Delay. Many coaches pair a capture app with an analysis app.
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 and BaM Video Delay both run fully offline with no login; 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
