# ERSB Lite vs CGMSIM

The clearest difference is review sentiment: CGMSIM at 100% against ERSB Lite's 0%. CGMSIM also leads on rating (5.0 vs 4.0) and in-app purchases (none vs 5). ERSB Lite's advantage is iOS requirement (13.0 vs 15.1). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. ERSB Lite sells 5 one-off in-app purchases. CGMSIM asks for nothing beyond the download.

CGMSIM holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 0% of ERSB Lite's written reviews are positive against 100% of CGMSIM's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on June 2, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | ERSB Lite | CGMSIM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/ersb-lite/id976322567/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cgmsim/id1667105182/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 253 MB | 43 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Attainment Company, Inc.](https://appshunter.io/developer/403989333) | [Lorenzo Sandini](https://appshunter.io/developer/1667105184) |

## 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 |


### CGMSIM

[App page](https://appshunter.io/ios/app/cgmsim/id1667105182)

Simulate managing Type 1 Diabetes by administering meals and insulin. Maintain target blood glucose levels while minimizing lows and highs. Integrate activity data for a realistic experience.

**Highlights:** Virtual Type 1 Diabetes subject management, Meal and insulin administration (MDI/CSII), Glycemic target range maintenance, Hypo/hyperglycemia alerts, Activity tracker integration (Fitbit, Google Fit), Nightscout CGM trace display, Success report generation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ERSB Lite free?

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

### Is CGMSIM free?

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

### Which has better reviews, ERSB Lite or CGMSIM?

CGMSIM is rated higher. ERSB Lite averages 4.0 out of 5 from 3 ratings, while CGMSIM averages 5.0 from 2 ratings.

### Do ERSB Lite or CGMSIM have ads?

Neither ERSB Lite nor CGMSIM shows ads.

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

ERSB Lite ships an update every 2 months, and CGMSIM every 2 months. Most recently, ERSB Lite was updated on June 2, 2026 and CGMSIM on September 16, 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.*