Comparison

HeyG Math vs Sapling Isle

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

Head to head
About

HeyG Math

Features
Read full description

Math usually isn't hard because you're bad at it. It's hard because steps get skipped, assumptions go unstated, and mistakes feel personal. Hey G works differently. Hey G helps you work through math problems one step at a time. You try a problem. G responds calmly — showing every step, explaining why it works, and helping you recover if you get stuck. No grades. No timers. No pressure. WHAT YOU GET Every course is a complete, structured curriculum — not random practice problems. Content spans Pre-Algebra through Calculus, with SAT, ACT, and GRE prep courses available. Your first course is completely free, forever. Pick any course in the catalog and it's yours — no credit card, no trial period, no catch. HOW IT WORKS - Pick a course and start at Chapter 1 - Work through problems at your own pace - Get clear, step-by-step explanations when you need them - G adapts to your level — quietly, without making it weird - Pick up exactly where you left off, every time WHO IT'S FOR Hey G is built for: - High school students working through Algebra, Geometry, or Trig - Parents helping with homework who need a refresher - Adults going back to school or preparing for standardized tests - Anyone who wants to understand why, not just get the answer AI TUTOR G is your personal math tutor. When you're stuck, G doesn't just give you the answer — G walks you through it, step by step, showing every operation and explaining every assumption. Your free course includes 5 AI tutoring sessions. Subscribe to AI Tutor ($12/month) for unlimited help across all your courses. COURSES AVAILABLE Foundation: Arithmetic, Fractions & Decimals, Ratios, Pre-Algebra Core: Algebra 1 & 2, Geometry, Trigonometry, Pre-Calculus Advanced: Calculus I & II, Linear Algebra Test Prep: SAT Math, ACT Math, GRE Quantitative WHAT MAKES HEY G DIFFERENT - No skipped steps. Every explanation shows each operation. - No hidden assumptions. G states what other resources skip. - No judgment. Mistakes are handled gently and used to help you learn. - No tricks. This isn't a game. It's a thinking partner. You don't need to be "good at math" to use Hey G. You just need to be willing to try. --- Subscription Information: AI Tutor is available as a monthly subscription for $11.99/month. Payment is charged to your Apple ID account at confirmation of purchase. Subscription automatically renews unless canceled at least 24 hours before the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase. Terms of Service: https://heyg.app/terms Privacy Policy: https://heyg.app/privacy

About

Sapling Isle

Explore physics and astronomy through interactive 3D experiments. Manipulate variables, observe system responses, and delve into underlying scientific concepts and equations. Offers multilingual support and adaptive layouts for iPhone and iPad.

Highlights
  • Interactive 3D physics experiments
  • 3D Solar System simulation
  • Black hole and light bending exploration
  • Microscopic world simulations
  • Multivariable comparisons and graphs
  • Exploration of equations and model limits
  • Multilingual interface
Features
Read full description

Sapling Isle is a multilingual interactive science lab that connects observable phenomena with advanced scientific concepts on iPhone and iPad. Change variables directly, observe how a system responds, read graphs and measurements, then explore the equations, assumptions, and limits behind the model. Explore nature and the universe • Control a 3D Solar System and observe planetary motion and astronomical time • Follow curved light, an accretion disk, and Einstein rings around a black hole Enter a hands-on physics lab • Explore forces, motion, heat, energy, magnetic fields, light, and atoms • Compare heating, compression, and diffusion in a 3D microscopic world • Investigate orbits, waves, entropy, Boltzmann distributions, quantum tunneling, and double-slit patterns Explore at your own depth • Start with direct manipulation and visual feedback • Continue with multivariable comparisons, measurements, and graphs • Go deeper into equations, approximations, and model boundaries • Choose from 10 interface languages • Adaptive layouts for both iPhone and iPad • No account, advertising, or cross-app tracking • Progress, camera frames, and experiment data are handled primarily on device Pick an island, begin with a phenomenon, and follow the evidence toward deeper models.

Screenshots

HeyG Math4 screens
Sapling Isle4 screens

Verdict

The call

The clearest difference is update cadence: Sapling Isle at fortnightly against HeyG Math's every 7 months. HeyG Math's advantage is iOS requirement (15.1 vs 18.0). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

HeyG Math ships an update every 7 months, Sapling Isle fortnightly. The most recent releases landed on November 5, 2026 and November 3, 2026 respectively.

Scorecard2 real differences Ā· 6 level
HeyG Math versus Sapling Isle: the parameters behind the verdict, then further details
ParameterHeyG MathSapling Isle
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 7 monthsFortnightly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better18.0
Further details — not scored
Size53 MB40 MB
Age rating4+4+
DeveloperRonald Edmeades大鹏 张

In-app purchases

None

HeyG Math

No in-app purchases

None

Sapling Isle

No in-app purchases

Questions

Is HeyG Math free?
HeyG Math is free to download, with no in-app purchases.
Is Sapling Isle free?
Sapling Isle is free to download, with no in-app purchases.
Do HeyG Math or Sapling Isle have ads?
Neither HeyG Math nor Sapling Isle shows ads.
Which is updated more often, HeyG Math or Sapling Isle?
HeyG Math ships an update every 7 months, and Sapling Isle fortnightly. Most recently, HeyG Math was updated on November 5, 2026 and Sapling Isle on November 3, 2026.

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