# ERSB Lite vs Numbuko

The clearest difference is in-app purchases: Numbuko at none against ERSB Lite's 5. ERSB Lite's advantage is update cadence (every 2 months vs every 108 months) and iOS requirement (13.0 vs 17.6).

ERSB Lite ships an update every 2 months, Numbuko every 108 months. The most recent releases landed on November 1, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | ERSB Lite | Numbuko |
| --- | --- | --- |
| Price | **Free** | — |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/ersb-lite/id976322567/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | **Every 2 months** | Every 108 months |
| Monetization | Free with in-app purchases | — |
| Size | 253 MB | 2 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [Attainment Company](https://appshunter.io/developer/403989333) | [Andrew Manches](https://appshunter.io/developer/461795581) |

## What reviewers say

### ERSB Lite

[App page](https://appshunter.io/ios/app/ersb-lite/id976322567)

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.

**Highlights:** Early literacy skill development, Systematic instruction, Ongoing assessments, Progress to 2nd-grade reading level, Effective for intellectual disabilities, Effective for autism

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Levels 12-16 | $29.99 | one-time |
| Levels 17-21 | $29.99 | one-time |
| Levels 22-26 | $29.99 | one-time |
| Levels 2-6 | $29.99 | one-time |
| Levels 7-11 | $29.99 | one-time |


### Numbuko

[App page](https://appshunter.io/ios/app/numbuko/id979679711)

**In-app purchases:** none


## Frequently asked questions

### Is ERSB Lite free?

ERSB Lite is free to download, with in-app purchases available.

### Is Numbuko free?

Pricing for Numbuko is not currently listed on the App Store.

### Which is updated more often, ERSB Lite or Numbuko?

ERSB Lite ships an update every 2 months, and Numbuko every 108 months. Most recently, ERSB Lite was updated on November 1, 2026 and Numbuko on October 26, 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.*