Comparison

Grammaggio vs Read Not Guess

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

Head to head
About

Grammaggio

This app offers grammar exercises designed for children with Specific Language Impairment (SLI). It tracks scores and compares performance to age-based benchmarks, aiding language skill development.

Highlights
  • Grammar tasks for SLI
  • Score tracking
  • Age-based comparisons
  • Research-backed exercises
  • Progress monitoring
Features
Read full description

Grammaggio is a free app that contains a variety of grammar tasks based on research on the condition of Specific Language Impairment (SLI), a language disorder that delays the mastery of language skills in children who have no hearing loss or other developmental delays. Along with your score, Grammaggio will tell you how you compare to others your age. The Grammaggio app was developed as part of a program of research on SLI. The research is funded by R01DC001803 and R42DC013749. This study did not study the validity of the screening for children speaking African American English (AAE). We express our appreciation for the participation of more than 1,000 people (children, siblings and parents) who have contributed to this longitudinal research project and to the dedicated research staff.

About

Read Not Guess

This app offers science-based phonics lessons and decodable stories to help parents teach their children to read. It focuses on building reading confidence and fluency through an engaging and intuitive learning experience.

Highlights
  • Phonics-based reading lessons
  • Decodable stories for fluency
  • Intuitive design for parents and kids
  • Progress tracking
  • Engaging learning environment
Features
Read full description

# Read Not Guess: Teach Your Child to Read with Phonics Give your child the gift of reading with Read Not Guess, the easy-to-use app that helps parents teach their children to read using phonics and decodable stories. Our proven method, trusted by over 5,000 parents, makes learning to read simple and fun. With Read Not Guess, your child will master the basics of reading through engaging, phonics-based lessons designed to build confidence and fluency. The app features carefully crafted decodable stories, perfect for early readers, allowing your child to sound out words and develop strong reading skills. ## Key features: - Phonics-based lessons to support your child’s reading journey - Decodable stories that build fluency and confidence - Simple and intuitive design, easy for both parents and kids - Progress tracking to celebrate your child's reading success - A supportive and engaging learning environment Join thousands of parents who trust Read Not Guess to guide their child through the joy of reading. Start today and make reading easy, effective, and fun! Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Grammaggio2 screens
Read Not Guess4 screens

Verdict

The call

The clearest difference is in-app purchases: Grammaggio at none against Read Not Guess's 2. Grammaggio also leads on ads (none vs shown) and iOS requirement (9.0 vs 15.0). Read Not Guess's advantage is update cadence (weekly vs every 30 months) and ratings volume (7 vs 2). On price, rating 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. Read Not Guess sells 2 in-app purchases, starting at $3.99 per month. Grammaggio asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Grammaggio against 5.0 for Read Not Guess. Both are backed by a comparable volume of ratings — 2 and 7 respectively.

UpkeepUpdate frequency

Grammaggio ships an update every 30 months, Read Not Guess weekly. The most recent releases landed on June 11, 2026 and September 19, 2026 respectively.

Scorecard6 real differences · 4 level
Grammaggio versus Read Not Guess: the parameters behind the verdict, then further details
ParameterGrammaggioRead Not Guess
PriceFreeFree
Rating5.0 (2 ratings)5.0 (7 ratings)
Positive reviews—100.0% of reviews
Number of ratings27 — better
Update frequencyEvery 30 monthsWeekly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPodiPhone, iPod
Requires iOS9.0 — better15.0
Further details — not scored
Size35 MB113 MB
Age rating4+4+
DeveloperRice Innovations, LLCAldeman Education LLC

Customer experience

Grammaggio

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Read Not Guess

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Grammaggio

No in-app purchases

2 purchases

Read Not Guess

Subscriptions2
  • Monthly Pro$3.991 Month
  • Read Not Guess Pro$24.991 Year

Questions

Is Grammaggio free?
Grammaggio is free to download, with no in-app purchases.
Is Read Not Guess free?
Read Not Guess is free to download, with in-app purchases available.
Which has better reviews, Grammaggio or Read Not Guess?
Grammaggio and Read Not Guess are both rated 5.0 out of 5 on the App Store, from 2 and 7 ratings respectively.
Do Grammaggio or Read Not Guess have ads?
Read Not Guess shows ads; Grammaggio does not.
Which is updated more often, Grammaggio or Read Not Guess?
Grammaggio ships an update every 30 months, and Read Not Guess weekly. Most recently, Grammaggio was updated on June 11, 2026 and Read Not Guess on September 19, 2026.

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