Darts Form Review Online Manual
- What is this app?
- Top Menu
- Delay Cam Mode
- Burst Shots
- Gallery
- Analyze Feature
- AI Skeleton Tracking
- Settings
- Free vs. Pro
- FAQ
- Q. Dart impacts aren’t being detected properly
- Q. The footage orientation is wrong
- Q. I want to see the replay before throwing 3 darts
- Q. Where are my saved videos?
- Q. Where is Burst Shots data saved?
- Q. The play button doesn’t work when “All Shots” is selected in Compare mode
- Q. What languages are supported?
What is this app?
Darts Form Review is a camera app specifically designed for checking and analyzing darts throwing form.
It automatically detects the impact sound when a dart hits the board using the microphone, then records, extracts, and replays your throwing form. There’s no need to tap the screen each time — just set up and throw, and you can review your form instantly.
Available on both iOS and Android. Supports 8 languages for the UI.
Top Menu
When you launch the app, the top menu is displayed, giving you access to each mode.
Menu Structure
- Delay Cam — A mode that detects dart impact sounds and automatically replays your form
- Burst Shots — A mode that captures burst photos of 3 throws for frame-by-frame analysis (Pro only)
- Gallery — A mode for managing, viewing, and comparing saved data
Other Buttons
- ⚙ (Settings icon) — Opens the settings screen
- ? (Help icon) — Opens this manual in your browser
- Language — Switches the UI display language (Japanese, English, German, Traditional Chinese, Korean, Dutch, Spanish, French)
Delay Cam Mode
Overview
Delay Cam mode detects dart impact sounds and automatically replays your last 3 throws in slow motion. After every set of 3 throws, the footage is automatically played back, allowing you to review your form without ever touching the screen.
How to Use
- Tap Delay Cam from the top menu.
- On first launch, you will be asked to grant camera and microphone access. Please allow both.
- On first launch only, a guide about screen orientation adjustment will appear. Read it and tap “OK”.
- The screen enters MONITORING mode, displaying the camera feed.
- Throw your darts. Each time an impact sound is detected, a dot in the Throw Count area (bottom right) will light up.
- Once 3 impacts are detected, recording stops automatically and replay playback begins.
Monitoring Screen UI
Top-Left Area
| Button | Function |
|---|---|
| Rotate | Rotates the camera feed by 90 degrees |
| Mirror | Flips the camera feed horizontally (mirror view) |
| Loop | Toggles replay looping ON/OFF. When ON, the replay restarts from the beginning after finishing. When OFF, monitoring mode resumes automatically after the replay ends |
| Rear / Front | Switches between the front and rear cameras |
| Analyze | Opens the Analyze Menu (described below) |
Top-Right Area
| Button | Function |
|---|---|
| Settings (⚙) | Opens the settings screen |
| EXIT | Exits Delay Cam mode and returns to the top menu |
Bottom-Right Area
| Element | Description |
|---|---|
| Sensitivity | Adjusts the impact sound detection level from 1 to 10. Use the +/− buttons to change the value. Higher numbers make it more sensitive to quieter sounds |
| Throw Count | Displays the number of detected throws using 3 dots. Tap the dots to reset the count |
| Reset | Resets the throw count |
| Volume Meter | Displays the real-time microphone input level. The horizontal line indicates the threshold corresponding to the current Sensitivity setting |
Hide / Show Button
Tap the Hide button at the top left of the screen to hide all UI elements and view only the camera feed. Tap again to restore the UI.
Replay Screen UI
Once 3 impacts are detected, the screen automatically switches to replay mode.
- Tap the screen — Toggles the visibility of playback controls (play/pause button, seek bar)
- Rotate — Rotates the replay footage by 90 degrees
- Mirror — Flips the replay footage horizontally
- Loop — Toggles loop playback ON/OFF
- Analyze — Opens the Analyze Menu
- Save — Saves the current replay to the in-app Gallery. Any Analyze drawings such as grids and lines are embedded into the video
- Speed — Cycles playback speed through 1.0x → 0.5x → 0.25x
- Skip — Ends the replay and returns to monitoring mode
About Saving
Tap Save on the replay screen to save the footage to the in-app Gallery. Saved footage can be played back and reviewed anytime from the Gallery.
Burst Shots
Overview
Burst Shots mode detects 3 dart impact sounds and captures burst photos for each throw.
You can swipe through each frame one by one, from takeback through release to follow-through, enabling more detailed form analysis than Delay Cam’s video replay.
How to Use
- Tap Burst Shots from the top menu.
- On first launch, a screen orientation guide will appear. Tap “OK”.
- The screen enters READY mode. Tap the Start button to begin recording.
- Throw your darts during recording. Each time an impact sound is detected, a Throw Count dot will light up.
- Once 3 impacts are detected, recording stops automatically and frame extraction begins.
- When processing is complete, the RESULT screen appears, displaying the frame-by-frame viewer.
Recording Screen UI
In addition to the same UI as the Delay Cam monitoring screen, the following elements are available:
| Element | Description |
|---|---|
| Start | Starts recording |
| Stop | Cancels recording and returns to READY mode |
| Settings (⚙) | Opens the Burst Shots-specific settings screen |
Result Screen (Frame-by-Frame Viewer)
- Swipe left/right — Move to the previous or next frame
- Frame counter — Shows the impact frame as “● 0”, with surrounding frames displayed as relative numbers like “-5” or “+3”
- Seek bar — Visually indicates the current frame position
- Shot 1 / Shot 2 / Shot 3 tabs — Switch between the frame-by-frame data for each of the 3 throws
- All Shots — Displays all throws overlaid on top of each other
- ▶ / ⏸ button — Start/stop auto frame-by-frame playback
- Speed — Cycles auto-playback speed through 1x → 0.5x → 0.25x
- Rotate / Mirror — Rotate or flip the footage
- Analyze — Opens the Analyze Menu
- Track — Opens the Tracking Menu
- Retry — Exits the result screen and starts a new recording session
- EXIT — Exits Burst Shots mode and returns to the top menu
Gallery
Overview
The Gallery lets you manage, view, and compare data saved from Burst Shots and Delay Cam in a single list.
Gallery List Screen
Saved data is displayed as cards grouped by date. Each card contains the following information:
- Thumbnail — A preview image of the captured data
- Capture time
- Shot number (Shot 1, Shot 2, Shot 3)
- Mode badge — Shows “Burst Shots” or “Delay” to indicate the data type
- Note (if set)
- Bookmark icon — Toggle favorites ON/OFF
Filtering & Sorting
Use the icons at the top right of the Gallery list screen for the following actions:
| Icon/Button | Function |
|---|---|
| Calendar icon | Filter by date. Display only data from a specific day |
| Sort icon | Filter by favorites, data type, and other criteria |
Playing Back Data
Tap “Play” to open the viewer.
- Burst Shots data — Displayed in the frame-by-frame viewer. Swipe left/right to scrub through frames, or use auto-playback
- Delay Cam data — Displayed in the video player. Play/pause and seek bar controls are available
Within the viewer, you can use the Analyze Menu and the Track Menu (Burst Shots data only).
Delay Cam Data Playback Screen
- Save — Exports the video directly to your device’s photo app (Camera Roll / Gallery)
- Speed — Cycles playback speed through 1.0x → 0.5x → 0.25x
- Tap the screen — Toggles the visibility of playback controls (play/pause, seek bar)
Selecting & Deleting Data
- Tap “Select” at the top right of the Gallery list screen.
- Tap the cards you want to delete to select them (multiple selection is supported).
- Tap the “Delete” button at the bottom of the screen.
- A confirmation dialog will appear. Choose “Delete” to permanently remove the selected data.
Compare Feature (Pro Only)
Tap the “Compare” button at the bottom right of the Gallery list screen to enter Compare mode.
- Select 2 to 3 items you want to compare (Delay Cam data cannot be selected for comparison).
- Tap the “Play (Compare)” button.
Compare Display Modes
On the compare screen, you can switch between the following two display modes:
| Mode | Description |
|---|---|
| Split View | Displays the selected data side by side vertically or horizontally. Each panel is labeled A / B / C |
| Overlay View | Overlays all selected data on top of each other with transparency |
- Timing is automatically aligned across all data based on the impact frame
- Swipe left/right to scrub through all data simultaneously
Analyze Feature
The Analyze feature is a set of form analysis tools available in Delay Cam mode, Burst Shots mode, and the Gallery viewer.
Tap the Analyze button on screen to open the menu.
Grid
Displays fixed grid lines on the screen.
| Type | Description |
|---|---|
| Grid (3×3) | Displays a 3×3 grid on the screen |
| Grid (5×5) | Displays a 5×5 grid on the screen |
Tap the same button again to turn it OFF.
FLEX (Flexible Grid) — Pro Only
An advanced grid where you can freely change the number of divisions and drag individual grid lines to adjust their positions.
- V (vertical lines) — Adjust from 2 to 8 divisions using the +/− buttons
- H (horizontal lines) — Adjust from 2 to 8 divisions using the +/− buttons
- Each grid line — Drag to freely adjust its position
- Reset — Resets grid line positions and division counts to their defaults
- Color palette — Choose the grid line color from 6 options (blue, white, red, yellow, green, purple)
LINE — Pro Only
Draw free-form straight lines anywhere on the screen.
- + button — Adds a new line
- − button — Deletes the selected line (if no line is selected, deletes the most recently added line)
- Clear — Deletes all lines
- Line controls — Tap a line to select it, then drag the handles (circular dots) at each end to change the angle or position. You can also drag the line itself to move it
- Color palette — Change the selected line’s color from 6 options
MARKER — Pro Only
Place dots (points) anywhere on the screen.
- Tap the screen to place a marker at that position
- Tap a marker to select it, then drag to adjust its position
- − button — Deletes the selected marker
- Clear — Deletes all markers
- Color palette — Change the marker color from 6 options
MEDIA (Media Overlay) — Pro Only
Select an image or video from your device’s Camera Roll and overlay it semi-transparently on top of the footage.
- Select — Choose media from your device’s photo app
- Op. (Opacity) — Adjust the overlay transparency using +/− buttons (0.1 to 1.0)
- Reset — Resets the media position and size to their defaults
- Clear — Removes the media
- Use pinch gestures to resize the media, and drag to reposition it
AI Skeleton Tracking
AI Skeleton Tracking uses AI to detect a person’s skeletal joints and visualize the motion trajectory of your throwing form. Tap the Track button on screen to open the menu.
Tracking ON/OFF
Toggles the entire tracking feature ON or OFF. When OFF, all tracking drawings are hidden.
White Filter
Applies a semi-transparent white overlay on the footage, making the tracking lines easier to see.
- ON/OFF — Toggle the filter visibility
- Opacity slider — Adjust the filter intensity
Skeleton Color
Assign a skeleton line color from 7 options for each shot (A: Shot 1, B: Shot 2, C: Shot 3).
When overlaying multiple data sets in Compare mode, assigning different colors to each shot makes them easy to distinguish.
Body Part Display Settings
For each of the following 6 body parts, you can independently toggle Trace and Tracking ON or OFF.
| Body Part | Description | Trace Color |
|---|---|---|
| Wrist | Right and left wrist | Red |
| Elbow | Right and left elbow | Orange |
| Shoulder | Right and left shoulder | Yellow |
| Hip | Right and left hip | Blue |
| Ankle | Right and left ankle | Green |
| Nose | Face position (nose) | Purple |
- Trace — Draws the motion trail (afterimage line) of the body part. Useful for reviewing the overall motion path of your throw
- Tracking — Draws the body part’s position (dot) on the current frame along with the connecting skeleton lines
Settings
The settings screen can be opened from the ⚙ icon on the top menu, or from the ⚙ icon within Delay Cam / Burst Shots screens.
General Settings
| Setting | Description | Default |
|---|---|---|
| Count Interval | A cooldown period to prevent false detection when sounds occur in rapid succession. After an impact sound is detected, the next detection is ignored for the duration set here. Adjustable from 0.5 to 5.0 seconds in 0.5-second increments | 1.0 sec |
| Watermark | Whether to display the app logo on exported videos. Can be turned OFF in the Pro version. Always ON in the Free version | ON |
Burst Shots-Specific Settings
The following settings are available within Burst Shots mode:
| Setting | Description | Default |
|---|---|---|
| Extract Before | How many seconds before the impact sound to start extracting frames. Adjustable from 0.5 to 5.0 seconds in 0.1-second increments | 2.5 sec |
| Extract After | How many seconds after the impact sound to continue extracting frames. Adjustable from 0.1 to 1.0 seconds in 0.1-second increments | 0.2 sec |
Free vs. Pro
Darts Form Review is free to download and use, but some advanced features are available only in the Pro version (one-time purchase).
Feature Comparison
| Feature | Free | Pro |
|---|---|---|
| Delay Cam mode (auto-replay) | ||
| Gallery (list view & playback) | ||
| Grid (3×3 / 5×5) | ||
| Burst Shots (burst photography) | ||
| FLEX (flexible grid) | ||
| LINE (line drawing) | ||
| MARKER (marker placement) | ||
| MEDIA (media overlay) | ||
| Watermark OFF |
FAQ
Q. Dart impacts aren’t being detected properly
A. Please check the following:
- Use Count Test to test and adjust the sensitivity level. Raising the level makes it respond to quieter sounds.
- Loud ambient noise (air conditioning, music, conversation, etc.) can cause false detections or missed detections. Use the app in a quiet environment or adjust the sensitivity level.
- Make sure the microphone is facing toward the dartboard.
Q. The footage orientation is wrong
A. Tap the Rotate button at the top left to rotate the view by 90 degrees until it’s correct. If the image is laterally reversed when using the front camera, use the Mirror button to flip it.
Q. I want to see the replay before throwing 3 darts
A. In Delay Cam, the replay starts automatically once the Throw Count reaches 3. It’s not possible to view the replay midway, but you can tap the Reset button to reset the Throw Count and start over.
Q. Where are my saved videos?
A. Data saved using the Save button in Delay Cam is stored in the in-app Gallery. From the Gallery viewer, you can play back the video and use the Save button to export it to your device’s photo app (Camera Roll / Gallery).
Q. Where is Burst Shots data saved?
A. Data captured with Burst Shots is automatically saved to the in-app Gallery when processing is complete. You can view, play back, and compare it from the Gallery.
Q. The play button doesn’t work when “All Shots” is selected in Compare mode
A. Auto-playback is disabled during All Shots (overlay of all throws) view due to rendering load. Use left/right swipe to scrub through frames instead. Switch to an individual Shot 1 / Shot 2 / Shot 3 tab to use auto-playback.
Q. What languages are supported?
A. The app supports 8 languages: Japanese, English, German, Traditional Chinese, Korean, Dutch, Spanish, and French. Switch languages using the “Language” button at the bottom of the top menu.
