# BDI vs SLK Curriculum

The clearest difference is rating: SLK Curriculum at 4.6 against BDI's 2.3. SLK Curriculum also leads on update cadence (weekly vs every 2 months). BDI's advantage is in-app purchases (none vs 22) and iOS requirement (13.0 vs 17.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. SLK Curriculum sells 16 in-app purchases, starting at $25.99 per month. BDI asks for nothing beyond the download.

SLK Curriculum holds the better App Store score, 4.6 against 2.3. Both are backed by a comparable volume of ratings — 6 and 9 respectively.

BDI ships an update every 2 months, SLK Curriculum weekly. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | BDI | SLK Curriculum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (6 ratings)](https://appshunter.io/ios/app/bdi-3-mobile-data-solution/id1532433975/reviews) | **[4.6 (9 ratings)](https://appshunter.io/ios/app/slk-curriculum/id6468837197/reviews)** |
| Number of ratings | 6 | **9** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 208 MB | 127 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 9+ |
| Developer | [RiversideInsights](https://appshunter.io/developer/1483738140) | [Speech and Language Kids](https://appshunter.io/developer/1710629636) |

## What reviewers say

### BDI

[App page](https://appshunter.io/ios/app/bdi-3-mobile-data-solution/id1532433975)

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.

**Highlights:** Online and offline assessment administration, Guided digital scoring assistance, Basal and ceiling indicators, Built-in timers, Modular reporting options, Student data management

**Features:** Vision Pro support

**In-app purchases:** none


### SLK Curriculum

[App page](https://appshunter.io/ios/app/slk-curriculum/id6468837197)

This comprehensive speech and language therapy curriculum helps children make faster progress with less stress for adults. It offers a streamlined system for planning, teaching, and tracking communication skills, with customizable modules and AI-powered tools for creating practice materials.

**Highlights:** Assessment tool for skill pinpointing, Customizable curriculum modules, Year-long mentorship program, Core Language Program (K-5), AI-powered material generators, Private discussion board & support group, 50+ in-depth courses

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (16)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $25.99 | per month |
| Monthly Plan | $25.99 | per month |
| Monthly Plan | $25.99 | per month |
| Monthly Plan | $25.99 | per month |
| Monthly Plan | $49.99 | per month |
| Annual Plan | $259.99 | per year |
| Annual Plan | $259.99 | per year |
| Annual Plan | $259.99 | per year |
| Annual Plan | $259.99 | per year |
| Annual Plan | $499.99 | per year |
| One Time Purchase Plan | $79.99 | one-time |
| One Time Purchase Plan | $99.99 | one-time |
| One Time Purchase Plan | $349.99 | one-time |
| One Time Purchase Plan | $449.99 | one-time |
| One Time Purchase Plan | $499.99 | one-time |
| One Time Purchase Plan | $799.99 | one-time |


## Frequently asked questions

### Is BDI free?

BDI is free to download, with no in-app purchases.

### Is SLK Curriculum free?

SLK Curriculum is free to download, with in-app purchases available.

### Which has better reviews, BDI or SLK Curriculum?

SLK Curriculum is rated higher. BDI averages 2.3 out of 5 from 6 ratings, while SLK Curriculum averages 4.6 from 9 ratings.

### Do BDI or SLK Curriculum have ads?

Neither BDI nor SLK Curriculum shows ads.

### Which is updated more often, BDI or SLK Curriculum?

BDI ships an update every 2 months, and SLK Curriculum weekly. Most recently, BDI was updated on October 5, 2026 and SLK Curriculum on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*