Replay Notebook is a personal sports journal for iPhone, built around tennis practice. Keep your clips, comparisons and observations together, then bring one useful thought to your next session.
Available on the App Store for iPhone. These pages describe the current app.
Read the getting-started guide
From this attempt to next practice
- Plan and record. Choose a focus, capture a short attempt or import your own video from Photos or Files.
- Choose the same moment. Align an event in each clip manually, then play them on one linked timeline.
- Look closely. Step actual source frames and add drawings to what you notice. Keep your written observations and voice memos private.
- Share and return. Export the review you choose, save one next-practice focus and revisit it when you return.
Custom sport and skill labels help organize your notebook. The app does not identify technique, score performance or offer automatic coaching.
Show the moment you mean
Export a 1080p SDR MP4 up to 120 final seconds, or a PNG still. Choose the layout, labels, public caption and drawings. Optional narration records over a locked final-speed preview, up to 60 final seconds. Private notes and voice memos are separate from public output.
Drawings stay fixed on the source image. A 2D angle describes the view in that image; it is not a calibrated joint measurement. Manual anchors align events without changing the pace of either action.
Keep a useful notebook
Free includes 3 active sessions and 30 active attempts, plus the core comparison, annotation, full-quality export, audio and editable-backup tools. Archiving frees active capacity while keeping sessions available to review, edit, export and use as references.
Optional Replay Notebook Pro adds active capacity and saving custom capture templates, review filters and export styles. Monthly and annual plans provide the same features. Apple shows the available localized price and billing period before purchase. Any trial is shown with its terms before purchase.
The app requires iOS 26 or later. Capture formats and recording availability depend on your iPhone, permissions, storage and current device conditions.
Local by design
No app account, ads, developer backend or cloud AI. Review and editing work on your iPhone after selected media has been acquired. Photos or Files providers, Apple purchases, device backups and sharing destinations may use their own services.
Editable backups contain private journal content and required media. They are not encrypted or password-protected by the app. Choose where to save them carefully.