RadSounds Cause/Effect Lite vs TD CoPilot
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RadSounds Cause/Effect Lite
This educational app allows users to create custom music playlists by recording, importing, or using provided songs. It offers various playback modes, including momentary, timed, and playlist cycling, and is switch-friendly for users with physical challenges.
- Customizable music playlists
- Record or import music
- Momentary playback mode
- Timed playback mode
- Playlist cycling mode
- Switch-friendly access
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RadSounds is the world's greatest cause/effect music program for special needs learners. You can customize your playlist by recording or singing new music to your iPad, importing from your iPad's music library, or use the many great songs that we provide, from many types. There is Momentary mode, where the music plays for only the time you hold your finger on the iPad, Timed mode, where the music plays for a specified number of seconds upon each activation, or an advanced mode where the user chooses songs by cycling through their playlist. RadSounds is *switch-friendly*, that is, for those with physical challenges, a switch (or button) can be plugged into our iPad Switch Interface for cordless access to switch-friendly apps.
TD CoPilot
This app calibrates eye tracking devices for optimal performance and user experience. It also provides access to device settings, firmware updates, and battery status information.
- Eye tracker calibration
- Device settings customization
- Firmware update tracking
- Application version display
- Battery status verification
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TD CoPilot is the iOS-based eye tracking calibration app for your Tobii Dynavox device. Like all eye tracking systems, this device requires calibration. That's where the TD CoPilot app comes in. Quick and easy calibrations ensure your device is accurate, works correctly and delivers the best experience. The TD CoPilot app also provides access to general information such as settings, firmware updates, version numbers, and battery status. TD CoPilot functions: • Keeps your device in peak operating form by calibrating the eye tracker to your eyes • Customizes device settings to meet your specific needs • Tracks hardware updates and lets you explore the latest features and user experiences of your device • Tells you the application version • Verifies the status of your device battery life
Verdict
The clearest difference is rating: RadSounds Cause/Effect Lite at 5.0 against TD CoPilot's 3.7. RadSounds Cause/Effect Lite also leads on iOS requirement (8.0 vs 15.0). TD CoPilot's advantage is in-app purchases (none vs 1) and update cadence (every 2 months vs every 11 months). On price, ratings volume, ads and monetization model 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. RadSounds Cause/Effect Lite sells 1 one-off in-app purchase. TD CoPilot asks for nothing beyond the download.
RadSounds Cause/Effect Lite holds the better App Store score, 5.0 against 3.7. Both are backed by a comparable volume of ratings — 2 and 3 respectively.
RadSounds Cause/Effect Lite ships an update every 11 months, TD CoPilot every 2 months. The most recent releases landed on September 29, 2026 and October 2, 2026 respectively.
| Parameter | RadSounds Cause/Effect Lite | TD CoPilot |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 3.7 (3 ratings) |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 11 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPad | iPad |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 114 MB | 57 MB |
| Age rating | 4+ | 4+ |
| Developer | RJ Cooper & Associates, Inc. | Tobii Dynavox LLC |
Customer experience
RadSounds Cause/Effect Lite
TD CoPilot
In-app purchases
RadSounds Cause/Effect Lite
- RadSounds Full Upgrade$4.99
TD CoPilot
No in-app purchases
Questions
Is RadSounds Cause/Effect Lite free?
Is TD CoPilot free?
Which has better reviews, RadSounds Cause/Effect Lite or TD CoPilot?
Do RadSounds Cause/Effect Lite or TD CoPilot have ads?
Which is updated more often, RadSounds Cause/Effect Lite or TD CoPilot?
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