# Operating Systems Quiz (BSCS) vs RAINTREE ISC

The clearest difference is in-app purchases: RAINTREE ISC at none against Operating Systems Quiz (BSCS)'s 7. Operating Systems Quiz (BSCS)'s advantage is iOS requirement (12.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Operating Systems Quiz (BSCS) sells 7 in-app purchases, starting at $4.99 per month. RAINTREE ISC asks for nothing beyond the download.

Operating Systems Quiz (BSCS) ships an update every 3 weeks, RAINTREE ISC monthly. The most recent releases landed on September 22, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Operating Systems Quiz (BSCS) | RAINTREE ISC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Monthly |
| Size | 68 MB | 94 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Arshad Iqbal](https://appshunter.io/developer/1547001151) | [Panha Sa](https://appshunter.io/developer/1534830463) |

## What reviewers say

### Operating Systems Quiz (BSCS)

[App page](https://appshunter.io/ios/app/operating-systems-quiz-bscs/id1581425762)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Package | $4.99 | per month |
| 3 Months Package | $9.99 | per 3 months |
| 6 Months Package | $14.99 | per 6 months |
| 1 Year Package | $19.99 | per year |
| 1500 Coins | $0.99 | one-time |
| 3500 Coins | $1.99 | one-time |
| 6000 Coins | $2.99 | one-time |


### RAINTREE ISC

[App page](https://appshunter.io/ios/app/raintree-isc/id1625619311)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Operating Systems Quiz (BSCS) free?

Operating Systems Quiz (BSCS) is free to download, with in-app purchases available.

### Is RAINTREE ISC free?

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

### Do Operating Systems Quiz (BSCS) or RAINTREE ISC have ads?

Both Operating Systems Quiz (BSCS) and RAINTREE ISC show ads.

### Which is updated more often, Operating Systems Quiz (BSCS) or RAINTREE ISC?

Operating Systems Quiz (BSCS) ships an update every 3 weeks, and RAINTREE ISC monthly. Most recently, Operating Systems Quiz (BSCS) was updated on September 22, 2026 and RAINTREE ISC on September 7, 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.*