# Bus993 vs Greatest Common Factor

The clearest difference is monetization model: Bus993 at free against Greatest Common Factor's paid. Bus993 also leads on update cadence (every 2 months vs every 38 months). On price, ads, in-app purchases and device support there is nothing between them.

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

Bus993 ships an update every 2 months, Greatest Common Factor every 38 months. The most recent releases landed on November 2, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Bus993 | Greatest Common Factor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/greatest-common-factor/id1573121817/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 38 months |
| Monetization | **Free** | Paid |
| Size | 38 MB | 1 MB |
| Requires iOS | **13.0** | 14.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Roadcast Tech Solutions Private Limited](https://appshunter.io/developer/1060734163) | [H Valeur](https://appshunter.io/developer/621824042) |

## What reviewers say

### Bus993

[App page](https://appshunter.io/ios/app/bus993/id1304366910)

This app allows parents to track their child's school bus in real-time, receive notifications for pick-up and drop-off, and mark attendance. It enhances communication between parents and drivers, ensuring child safety during commutes.

**Highlights:** Real-time bus tracking, Mark attendance (present/absent), Notifications for pick-up/drop-off, SMS alerts for bus activity, View child's location on map, Estimated Time of Arrival (ETA)

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

**In-app purchases:** none


### Greatest Common Factor

[App page](https://appshunter.io/ios/app/greatest-common-factor/id1573121817)

This app helps users find the factors of numbers, calculate the Greatest Common Factor (GCF) for two or more numbers, and simplify fractions. It's a useful tool for understanding number theory concepts and performing fraction simplification.

**Highlights:** Find factors of a number, Calculate GCF of two or more numbers, Simplify fractions, Understand number theory concepts, Fraction simplification tool

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

**In-app purchases:** none


## Frequently asked questions

### Is Bus993 free?

Bus993 is free to download, with no in-app purchases.

### Is Greatest Common Factor free?

Greatest Common Factor is free to download, with no in-app purchases.

### Do Bus993 or Greatest Common Factor have ads?

Neither Bus993 nor Greatest Common Factor shows ads.

### Which is updated more often, Bus993 or Greatest Common Factor?

Bus993 ships an update every 2 months, and Greatest Common Factor every 38 months. Most recently, Bus993 was updated on November 2, 2026 and Greatest Common Factor on October 30, 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.*