# Grade 12 Math & Science vs Greybobby

The clearest difference is price: Greybobby at Free against Grade 12 Math & Science's $1.99. Greybobby also leads on update cadence (every 2 months vs every 40 months) and device support (4 vs 2). On ads and in-app purchases there is nothing between them.

Greybobby is free to download; Grade 12 Math & Science costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Grade 12 Math & Science ships an update every 40 months, Greybobby every 2 months. The most recent releases landed on October 8, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Grade 12 Math & Science | Greybobby |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/grade-12-math-and-science/id552696693/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 2 MB | 50 MB |
| Requires iOS | 18.2 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Prachi Pimpalkhare](https://appshunter.io/developer/359099311) | [Greybobby Ministries Inc](https://appshunter.io/developer/1794185460) |

## What reviewers say

### Grade 12 Math & Science

[App page](https://appshunter.io/ios/app/grade-12-math-and-science/id552696693)

This app offers interactive quizzes for Grade 12 math and science, making learning fun and effective. It provides instant feedback, progress tracking, and offline access to help students master key concepts. Designed for young learners, it ensures a safe and distraction-free educational experience.

**Highlights:** Topic-wise quizzes, Instant feedback, Progress tracking with charts, Score reset for retakes, Offline mode, Child-friendly design

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Greybobby

[App page](https://appshunter.io/ios/app/greybobby/id6446960949)

**In-app purchases:** none


## Frequently asked questions

### Is Grade 12 Math & Science free?

Grade 12 Math & Science costs $1.99, with no in-app purchases.

### Is Greybobby free?

Greybobby is free to download, with no in-app purchases.

### Do Grade 12 Math & Science or Greybobby have ads?

Neither Grade 12 Math & Science nor Greybobby shows ads.

### Which is updated more often, Grade 12 Math & Science or Greybobby?

Grade 12 Math & Science ships an update every 40 months, and Greybobby every 2 months. Most recently, Grade 12 Math & Science was updated on October 8, 2026 and Greybobby on October 13, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*