# Satender Sir vs Study91Pro

The clearest difference is in-app purchases: Satender Sir at none against Study91Pro's 10. Satender Sir also leads on update cadence (every 2 months vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Study91Pro sells 10 one-off in-app purchases. Satender Sir asks for nothing beyond the download.

Satender Sir ships an update every 2 months, Study91Pro every 4 months. The most recent releases landed on October 12, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Satender Sir | Study91Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 4 months |
| Size | 109 MB | 144 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anuj Gupta](https://appshunter.io/developer/1651060633) | [Online Learning](https://appshunter.io/developer/1790866777) |

## What reviewers say

### Satender Sir

[App page](https://appshunter.io/ios/app/satender-sir/id6475081041)

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

**In-app purchases:** none


### Study91Pro

[App page](https://appshunter.io/ios/app/study91pro/id6475599028)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Package - AQ | $29.99 | one-time |
| Package - AU | $34.99 | one-time |
| Package - AV | $34.99 | one-time |
| Package - AW | $39.99 | one-time |
| Package - AX | $39.99 | one-time |
| Package - AY | $39.99 | one-time |
| Package - BD | $39.99 | one-time |
| Package - BE | $44.99 | one-time |
| Package - BH | $49.99 | one-time |
| Package - BF | $49.99 | one-time |


## Frequently asked questions

### Is Satender Sir free?

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

### Is Study91Pro free?

Study91Pro is free to download, with in-app purchases available.

### Do Satender Sir or Study91Pro have ads?

Neither Satender Sir nor Study91Pro shows ads.

### Which is updated more often, Satender Sir or Study91Pro?

Satender Sir ships an update every 2 months, and Study91Pro every 4 months. Most recently, Satender Sir was updated on October 12, 2026 and Study91Pro on September 24, 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.*