RadSounds Cause/Effect Lite vs ERSB Lite
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
Read full descriptionHide full description
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.
ERSB Lite
This app builds early reading skills for students progressing from foundational literacy. It uses systematic instruction and assessments to help individuals read independently, proving effective for those with intellectual disabilities and autism.
- Early literacy skill development
- Systematic instruction
- Ongoing assessments
- Progress to 2nd-grade reading level
- Effective for intellectual disabilities
- Effective for autism
Read full descriptionHide full description
Note: This is the Free version of ERSB. Level 1 with 5 lessons is Free! The rest of the levels are available through the in-app store. Early Reading Skills Builder™(ERSB) curriculum, based on a multi-year research project from the University of North Carolina at Charlotte, is a stepping stone for graduates of Attainment’s ELSB Curriculum. ERSB takes students who mastered these early literacy skills to a 2nd grade reading level. It incorporates systematic instruction and ongoing assessments to teach students to read independently. It’s been proven effective for students with moderate to severe intellectual disability and/or autism, including those with complex communication needs.
Verdict
The clearest difference is rating: RadSounds Cause/Effect Lite at 5.0 against ERSB Lite's 4.0. RadSounds Cause/Effect Lite also leads on monetization model (free vs free with in-app purchases) and iOS requirement (8.0 vs 13.0). ERSB Lite's advantage is update cadence (every 2 months vs every 11 months). On price, ratings volume, ads and in-app purchases 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 and ERSB Lite sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
RadSounds Cause/Effect Lite holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 3 respectively.
RadSounds Cause/Effect Lite ships an update every 11 months, ERSB Lite every 2 months. The most recent releases landed on October 29, 2026 and October 6, 2026 respectively.
| Parameter | RadSounds Cause/Effect Lite | ERSB Lite |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.0 (3 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 11 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPad | iPad |
| Requires iOS | 8.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 114 MB | 253 MB |
| Age rating | 4+ | 4+ |
| Developer | RJ Cooper & Associates, Inc. | Attainment Company |
Customer experience
RadSounds Cause/Effect Lite
ERSB Lite
In-app purchases
RadSounds Cause/Effect Lite
- RadSounds Full Upgrade$4.99
ERSB Lite
- Levels 12-16$29.99
- Levels 17-21$29.99
- Levels 22-26$29.99
Show 2 moreShow fewer
- Levels 2-6$29.99
- Levels 7-11$29.99
Questions
Is RadSounds Cause/Effect Lite free?
Is ERSB Lite free?
Which has better reviews, RadSounds Cause/Effect Lite or ERSB Lite?
Do RadSounds Cause/Effect Lite or ERSB Lite have ads?
Which is updated more often, RadSounds Cause/Effect Lite or ERSB Lite?
Other comparisons















