Inference Ace vs BDI
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Inference Ace
This app helps children in grades 2-5 improve their reading comprehension by teaching inference skills step-by-step. It uses a game-like environment with over 450 examples and a reward center to keep kids engaged. Detailed reporting is available for up to 10 students.
- Step-by-step inference skill building
- Game-like environment with reward center
- Over 450 examples designed by teachers
- Detailed reporting for multiple students
- Incremental learning with unlocked levels
- Guided learning for reduced frustration
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** Winner of prestigious Mom's Choice Award! Featured on Appolicious.com, iHeartThisApp.com ** Inference Ace helps kids who have trouble with reading comprehension. The app builds inference skills step-by-step until mastery in a fun, game-like environment. ***** 5 Stars - Nice app for practicing inference. Tons of examples. ***** 5 Stars - My son struggles with comprehension and doesn't like reading long passages. This app teaches a high level of skill in a format he enjoys. Thanks! Inference Ace is targeted to children in Grades 2-5 who can read the words (decode), but don't understand what they read. With over 450 examples, a fun and engaging reward center to increase motivation, and content designed by professional teachers and researchers, this app is bound to capture the attention of your kids. Best of all, there is detailed reporting for up to 10 students to meet the needs of teachers, therapists and parents. Key Features: - Incremental learning. New levels are unlocked only when your child is ready. - Guided learning for less frustration. Your child will always be guided to the correct answer. - Fun and engaging Reward Center to increase motivation. - Contains over 450 examples, with content designed by professional teachers and researchers. - Inferences are taught from multiple perspectives: what inferences are possible, which are not possible, multiple inferences per sentence, etc. - Our own Smart Sentence technology is used to infinitely vary the examples to prevent learning by rote. - Advanced levels include timers to ensure fluency. Research shows fluency in the foundation skills is critical to reading comprehension. Our apps are designed for and tested by typical and special needs children. Testers include children with Autism and other special needs. Our apps work for them! The free version of this app has 4 free levels for a single player. Remaining levels are unlocked by a single in-app purchase. Additional players can be purchased separately through an in-app purchase. Check out 'Inference Ace School Edition' if you prefer no in-app purchases. We are a member of the Moms with Apps program. We collect NO private information in our app, and our apps do not allow unrestricted web access. Inferencing is a key component of reading comprehension. If you can't infer fluently, you can't understand the story. Help your child now by getting started with our Inference Ace app. While you're at it, check out our other apps that target WH questions, identifying inference clues and identifying the main idea of a sentence or paragraph. We take customer service very seriously! If you ever have a problem or find that we've missed something, contact us at our website and we will do our best to fix the problem. ** Note: Inference Ace and Inference Clues intentionally use similar data sets. However, different skills are targeted. Also, when working through this app, you will encounter different variants of the same examples many times as we teach our players to derive multiple inferences from a single sentence -- just like expert readers do. This is an intentional feature, not a bug :-)
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
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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.
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Verdict
The clearest difference is rating: Inference Ace at 3.5 against BDI's 2.3. Inference Ace also leads on device support (3 vs 1) and ratings volume (22 vs 6). BDI's advantage is in-app purchases (none vs 3) and update cadence (every 2 months vs every 7 months). On price, ads and iOS requirement 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. Inference Ace sells 3 one-off in-app purchases. BDI asks for nothing beyond the download.
Inference Ace holds the better App Store score, 3.5 against 2.3. Both are backed by a comparable volume of ratings — 22 and 6 respectively.
Inference Ace ships an update every 7 months, BDI every 2 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Inference Ace | BDI |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (22 ratings) — better | 2.3 (6 ratings) |
| Positive reviews | 88.6% of reviews | — |
| Number of ratings | 22 — better | 6 |
| Update frequency | Every 7 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 12.2 — better | 13.0 |
| Further details — not scored | ||
| Size | 22 MB | 208 MB |
| Age rating | 4+ | 4+ |
| Developer | Janine Toole | RiversideInsights |
Customer experience
Inference Ace
BDI
In-app purchases
Inference Ace
- Upgrade to 2 Players$1.99
- Inference Ace: Buy All Levels$2.99
- Upgrade to 10 Players$2.99
BDI
No in-app purchases
Questions
Is Inference Ace free?
Is BDI free?
Which has better reviews, Inference Ace or BDI?
Do Inference Ace or BDI have ads?
Which is updated more often, Inference Ace or BDI?
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