Symbol Overlay Maker vs BDI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Symbol Overlay Maker
Easily create printable symbol overlays for communication devices and switches. Supports core words, classroom activities, and home communication with a large symbol library.
- Create printable symbol overlays
- Supports speech devices and switches
- Includes SymbolStix symbol set
- Supports core words and activities
- Printable for home and classroom use
Read full descriptionHide full description
The AbleNet Symbol Overlay app supports best outcomes by providing an easy way for therapists, teachers, and parents to quickly create printable symbol overlays for AbleNet speech devices and accessibility switches. Individuals benefit from the added context and support a symbol overlay provides. The AbleNet Symbol Overlay Maker app now includes the best-in-class SymbolStix symbol set with thousands of high-quality symbols. Create and print symbol overlays to support core words, activities in the classroom, and communication at home.
BDI
This application assists in administering clinical assessments for child development. It offers guided digital support for scoring, timers, and reporting, functioning both online and offline. Users can manage student data and sync assessments for web-based access.
- Online and offline assessment administration
- Guided digital scoring assistance
- Basal and ceiling indicators
- Built-in timers
- Modular reporting options
- Student data management
Read full descriptionHide full description
BDI-3 Mobile Data Solution (MDS) is an online and offline application to assist with the administration of the Battelle® Developmental Inventory 3rd Edition™ suite of products. The Battelle Developmental Complete, BDI-3 Screening Test, and the Battelle Early Academic Survey are clinical assessments that may be assessed through the BDI-3 MDS. The application provides guided digital assistance with the administration of each of the three products. The guided digital assistance includes basal and ceiling indicators, tallied scoring, built in timers, scoring rubrics, and modular reporting options. Within the application the user will be able to add students, administer all three types of BDI-3 assessments, and run reports both online and offline. It also allows the user to sync mobile record forms that they can then access on the riversidescore.com website.
Verdict
The clearest difference is rating: BDI at 2.3 against Symbol Overlay Maker's 2.0. BDI also leads on update cadence (every 2 months vs every 6 months) and ratings volume (6 vs 2). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
BDI holds the better App Store score, 2.3 against 2.0. Both are backed by a comparable volume of ratings — 2 and 6 respectively.
Symbol Overlay Maker ships an update every 6 months, BDI every 2 months. The most recent releases landed on September 23, 2026 and August 22, 2026 respectively.
| Parameter | Symbol Overlay Maker | BDI |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (2 ratings) | 2.3 (6 ratings) — better |
| Number of ratings | 2 | 6 — better |
| Update frequency | Every 6 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPad | iPad |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 142 MB | 208 MB |
| Age rating | 4+ | 4+ |
| Developer | AbleNet | RiversideInsights |
Customer experience
Symbol Overlay Maker
BDI
In-app purchases
Symbol Overlay Maker
No in-app purchases
BDI
No in-app purchases
Questions
Is Symbol Overlay Maker free?
Is BDI free?
Which has better reviews, Symbol Overlay Maker or BDI?
Do Symbol Overlay Maker or BDI have ads?
Which is updated more often, Symbol Overlay Maker or BDI?
Other comparisons















