Comparison

ERSB Lite vs Classroom Noise Meter

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

Classroom Noise Meter

Features
Read full description

Ruhe turns your iPad or iPhone into a friendly noise light for the classroom. A cheerful mascot shows at a glance how loud the room is – and quiet work gets rewarded instead of noise getting punished. HOW IT WORKS • Green: the mascot smiles – nice and quiet. • Yellow: it gently says “shh” – a little quieter, please. • Red: it covers its ears – and the flames go out. COLLECT FLAMES While the class stays quiet, one flame after another lights up around the mascot. Twelve flames complete the ring – time to celebrate! If it gets too loud, all flames go out. Only positive feedback, no scolding. MADE FOR LESSONS • Timer with ring display and start/stop button • Projector view: show the noise light full screen on a second display while you keep the controls • Adjustable sensitivity, or automatic calibration in 5 seconds • Lock the controls with Face ID so nobody in class changes anything • Light and dark appearance, screen stays on PRIVATE BY DESIGN Ruhe only measures the volume. Nothing is recorded, stored or sent. No account, no ads, no tracking. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://crabucate.de/ruhe-privacy.html

Screenshots

Classroom Noise Meter4 screens

Verdict

The call

The clearest difference is update cadence: Classroom Noise Meter at every 2 weeks against ERSB Lite's every 2 months. ERSB Lite's advantage is iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases and device support 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 and Classroom Noise Meter sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ERSB Lite ships an update every 2 months, Classroom Noise Meter every 2 weeks. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard2 real differences · 8 level
ERSB Lite versus Classroom Noise Meter: the parameters behind the verdict, then further details
ParameterERSB LiteClassroom Noise Meter
PriceFreeFree
Rating4.0 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPadiPhone, iPad — better
Requires iOS13.0 — better17.0
Further details — not scored
Size253 MB18 MB
Age rating4+4+
DeveloperAttainment CompanyFelix Leitenberger

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
3 purchases

Classroom Noise Meter

Subscriptions2
  • Ruhe Pro – Monthly3 Days trial$1.991 Month
  • Ruhe Pro – Yearly7 Days trial$8.991 Year
One-time1
  • Ruhe Pro – Lifetime$22.99

Questions

Is ERSB Lite free?
ERSB Lite is free to download, with in-app purchases available.
Is Classroom Noise Meter free?
Classroom Noise Meter is free to download, with in-app purchases available.
Do ERSB Lite or Classroom Noise Meter have ads?
Neither ERSB Lite nor Classroom Noise Meter shows ads.
Which is updated more often, ERSB Lite or Classroom Noise Meter?
ERSB Lite ships an update every 2 months, and Classroom Noise Meter every 2 weeks. Most recently, ERSB Lite was updated on November 1, 2026 and Classroom Noise Meter on November 6, 2026.

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