# 超解 vs CheckGrade

The clearest difference is price: 超解 at Free against CheckGrade's $1.99. 超解 also leads on iOS requirement (15.1 vs 18.6). CheckGrade's advantage is in-app purchases (none vs 4) and update cadence (every 5 days vs fortnightly). On ads and device support there is nothing between them.

超解 is free to download; CheckGrade costs $1.99 up front. 超解 sells 4 in-app purchases, starting at $2.99 per month. CheckGrade asks for nothing beyond the download.

超解 ships an update fortnightly, CheckGrade every 5 days. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | 超解 | CheckGrade |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/ai/id6742730126/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 50 MB | 2 MB |
| Requires iOS | **15.1** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Solwen AI](https://appshunter.io/developer/1799622084) | [Shih Yuen Hsiao](https://appshunter.io/developer/1685781048) |

## What reviewers say

### 超解

[App page](https://appshunter.io/ios/app/ai/id6742730126)

This AI-powered learning assistant provides step-by-step solutions and concept explanations for students. It supports all subjects and aligns with the latest curriculum, helping users truly understand and retain information.

**Highlights:** AI-powered step-by-step problem solving, Concept explanations and key idea analysis, Supports all subjects and the latest curriculum, Historical problem saving for review, 24/7 AI learning assistance, Intuitive interface for all ages

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月付方案 | $2.99 | per month |
| 月付方案 | $5.99 | per month |
| 年付方案 | $29.99 | per year |
| 年付方案 | $49.99 | per year |


### CheckGrade

[App page](https://appshunter.io/ios/app/checkgrade/id6804614052)

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

**In-app purchases:** none


## Frequently asked questions

### Is 超解 free?

超解 is free to download, with in-app purchases available.

### Is CheckGrade free?

CheckGrade costs $1.99, with no in-app purchases.

### Do 超解 or CheckGrade have ads?

Neither 超解 nor CheckGrade shows ads.

### Which is updated more often, 超解 or CheckGrade?

超解 ships an update fortnightly, and CheckGrade every 5 days. Most recently, 超解 was updated on October 30, 2026 and CheckGrade on October 29, 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.*