# WebSky App vs Grader.ai

The clearest difference is in-app purchases: WebSky App at none against Grader.ai's 2. WebSky App also leads on device support (3 vs 1) and iOS requirement (11.0 vs 16.6). Grader.ai's advantage is update cadence (every 4 days vs every 5 months). On price and ads there is nothing between them.

Both are free to download. Grader.ai sells 2 in-app purchases, starting at $14.99 per month. WebSky App asks for nothing beyond the download.

WebSky App ships an update every 5 months, Grader.ai every 4 days. The most recent releases landed on October 4, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | WebSky App | Grader.ai |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 days** |
| Size | 78 MB | 155 MB |
| Requires iOS | **11.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Novaya Studiya , Ooo](https://appshunter.io/developer/1439766096) | [Daur Talgatov](https://appshunter.io/developer/1836276247) |

## What reviewers say

### WebSky App

[App page](https://appshunter.io/ios/app/websky-app/id1567545689)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Grader.ai

[App page](https://appshunter.io/ios/app/graderai/id6751673412)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grader Plus Monthly | $14.99 | per month |
| Grader Plus Yearly | $79.99 | per year |


## Frequently asked questions

### Is WebSky App free?

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

### Is Grader.ai free?

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

### Do WebSky App or Grader.ai have ads?

Neither WebSky App nor Grader.ai shows ads.

### Which is updated more often, WebSky App or Grader.ai?

WebSky App ships an update every 5 months, and Grader.ai every 4 days. Most recently, WebSky App was updated on October 4, 2026 and Grader.ai on October 10, 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.*