Comparison

ERSB Lite vs CGMSIM

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ERSB Lite

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
Read full description

Note: This is the Free version of ERSB. Level 1 with 5 lessons is Free! The rest of the levels are available through the in-app store. Early Reading Skills Builder™(ERSB) curriculum, based on a multi-year research project from the University of North Carolina at Charlotte, is a stepping stone for graduates of Attainment’s ELSB Curriculum. ERSB takes students who mastered these early literacy skills to a 2nd grade reading level. It incorporates systematic instruction and ongoing assessments to teach students to read independently. It’s been proven effective for students with moderate to severe intellectual disability and/or autism, including those with complex communication needs.

About

CGMSIM

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
Read full description

CGMSIM lets you create a virtual Type 1 Diabetes subject, that you'll treat 24/7 with meals, multiple daily insulin injections (MDI) or a virtual insulin pump (CSII - continuous subcutaneous insulin infusion). Your goal is to maintain your virtual subject's glycemia in the treatment range 70-180 mg/dl (3.9 - 10 mmol/l) at least 70% of the time, with as few low glucose values as possible. Optional hypo- and hyperglycemia are delivered as push notifications and email alerts. CGMSIM imports your Fitbit® activity tracker's or Google Fit® activity data (steps, heart rate), which influence your subject's glycemic status. The CGM trace is displayed in Nightscout, where success reports can be generated.

Screenshots

CGMSIM4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard6 real differences · 4 level
ERSB Lite versus CGMSIM: the parameters behind the verdict, then further details
ParameterERSB LiteCGMSIM
PriceFreeFree
Rating4.0 (3 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings3 — better2
Update frequencyEvery 2 monthsEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS13.0 — better15.1
Further details — not scored
Size253 MB43 MB
Age rating4+12+
DeveloperAttainment Company, Inc.Lorenzo Sandini

Customer experience

ERSB Lite

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive0.0%
Neutral50.0%
Negative50.0%

CGMSIM

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

5 purchases

ERSB Lite

One-time5
  • Levels 12-16$29.99
  • Levels 17-21$29.99
  • Levels 22-26$29.99
Show 2 more
  • Levels 2-6$29.99
  • Levels 7-11$29.99
None

CGMSIM

No in-app purchases

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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