Comparison

Mental Math vs Kids Shelf

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

Head to head
About

Mental Math

Enhance your mental math skills for consulting, investment banking, and quant interviews. Practice realistic drills, track your progress with streaks, and build confidence with adaptive exercises and exam-style sessions.

Highlights
  • Adaptive drills
  • Case math chains
  • Estimation sandbox
  • Lightning rounds
  • Interview mode
  • Exam-style sessions
  • Career-specific prep
Features
Read full description

Sharpen mental math for consulting, IB, and quant interviews. Practice fast, realistic drills with estimation‑friendly scoring, track progress with streaks and XP, and build confidence under pressure. Highlights: - Adaptive drills, case math chains, and estimation sandbox - Lightning rounds, interview mode, and exam‑style sessions - Career‑specific prep for Consulting, IB, and Quant The career-specific content requires a subscription to access, one subscription allows for the use of ANY feature of the app. Privacy Policy: https://marble-liquid-091.notion.site/Heat-Studio-LLC-Privacy-Policy-28652966b06a807282efed41b058f5dd Terms of Service: https://marble-liquid-091.notion.site/Heat-Studio-LLC-Terms-of-Service-28652966b06a80028c0deeca197b4912?source=copy_link

About

Kids Shelf

Features
Read full description

KIDS SHELF: THE READING APP THAT RESPONDS Most reading apps read TO your child. Kids Shelf actually LISTENS as they read aloud—providing instant feedback, tracking every word, and building real reading skills. REAL-TIME SPEECH RECOGNITION Watch words light up green as your child reads them correctly. Our AI listens in real-time, matching what your child says to the text on screen. Struggling with a word? Tap it to hear the pronunciation and see syllable breakdowns. SPEECH PATTERN ANALYSIS Kids Shelf tracks 16 speech patterns used by professional Speech-Language Pathologists: R-sounds, L-sounds, TH, S-blends, and more. Identify challenges early and watch improvement over time. The app automatically becomes more forgiving with sounds your child finds difficult. PERSONALIZED FOR YOUR CHILD Calibrate the app to your child's unique voice. Adjust sensitivity so recognition works perfectly for them. Multiple child profiles let siblings each have their own progress, avatar, and settings. GAMIFICATION THAT MOTIVATES - Earn 0-3 stars based on reading accuracy - Gain XP and level up from Beginner Reader to Reading Champion - Collect 8 achievement badges - Build reading streaks with daily practice - Track vocabulary mastery for every word encountered 100+ STORIES FOR ALL LEVELS Browse stories organized by reading level (beginner, intermediate, advanced) and age group (4-6, 7-9, 10-13). New stories added daily. Download stories for offline reading anywhere. WORKS 100% OFFLINE Speech recognition runs entirely on your device. No internet required after downloading stories. Your child's voice data never leaves your phone - privacy by design. DETAILED PROGRESS TRACKING - Words read and accuracy rates - Reading time and streaks - Challenging words and sounds - Session-by-session improvement - Vocabulary growth over time PRACTICE MODE 220+ practice words organized by sound pattern. Focus on specific challenges with targeted training sessions. Perfect for reinforcing difficult sounds between reading sessions. PARENT-FRIENDLY FEATURES - Resume reading from where you left off - Tap any word for dictionary definitions - Configurable reading settings - Session time awareness - No ads, ever PERFECT FOR: - Parents wanting measurable reading progress - Homeschool families tracking multiple children - Kids with speech challenges who need extra practice - Tutors and reading specialists - Children ages 4-13 learning to read WHY KIDS SHELF? Other apps are entertainment disguised as education. Kids Shelf treats reading like a skill to be practiced - because it is. Active reading with real feedback builds real readers. Download Kids Shelf today and hear your child's reading improve! Questions? Contact us at support@kidshelf.app

Screenshots

Mental Math4 screens
Kids Shelf4 screens

Verdict

The call

The clearest difference is in-app purchases: Kids Shelf at none against Mental Math's 3. Kids Shelf also leads on iOS requirement (13.0 vs 15.1). On price, ads 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. Mental Math sells 3 in-app purchases, starting at $2.99 per 7 days. Kids Shelf asks for nothing beyond the download.

Scorecard2 real differences · 7 level
Mental Math versus Kids Shelf: the parameters behind the verdict, then further details
ParameterMental MathKids Shelf
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequency—Every 11 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.113.0 — better
Further details — not scored
Size56 MB77 MB
Age rating4+4+
DeveloperHeat Studio LLCVibhu Bhutani

In-app purchases

3 purchases

Mental Math

Subscriptions3
  • Career Pass - Weekly3 Days trial$2.997 Days
  • Career Pass - Monthly$7.991 Month
  • Career Pass - Annual$24.991 Year
None

Kids Shelf

No in-app purchases

Questions

Is Mental Math free?
Mental Math is free to download, with in-app purchases available.
Is Kids Shelf free?
Kids Shelf is free to download, with no in-app purchases.
Do Mental Math or Kids Shelf have ads?
Neither Mental Math nor Kids Shelf shows ads.

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