# OS Interview Questions vs Last Days Devs

The clearest difference is ads: Last Days Devs at none against OS Interview Questions's shown. Last Days Devs also leads on update cadence (every 6 months vs every 95 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. OS Interview Questions sells 1 one-off in-app purchase and Last Days Devs sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

OS Interview Questions ships an update every 95 months, Last Days Devs every 6 months. The most recent releases landed on October 12, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | OS Interview Questions | Last Days Devs |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/os-interview-questions/id1070986818/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 95 months | **Every 6 months** |
| Monetization | Free with in-app purchases | — |
| Size | 16 MB | 61 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RAVINDHIRAN SUMITHRA](https://appshunter.io/developer/1571016391) | [Seungil Park](https://appshunter.io/developer/1852918409) |

## What reviewers say

### OS Interview Questions

[App page](https://appshunter.io/ios/app/os-interview-questions/id1070986818)

Learn fundamental operating system concepts and interview questions with this educational app. It offers a user-friendly interface to explore topics, save favorites, and customize your reading experience. Sharpen your technical knowledge for career advancement.

**Highlights:** Operating system overview, Functions of operating systems, Types of operating systems, Embedded OS interview questions, User-friendly interface, Personalized library for favorites, Customizable themes and fonts

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OS Interview Questions | $3.99 | one-time |


### Last Days Devs

[App page](https://appshunter.io/ios/app/last-days-devs/id6757827745)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $3.99 | per month |
| Lifetime Access | $5.99 | one-time |


## Frequently asked questions

### Is OS Interview Questions free?

OS Interview Questions is free to download, with in-app purchases available.

### Is Last Days Devs free?

Last Days Devs is free to download, with in-app purchases available.

### Do OS Interview Questions or Last Days Devs have ads?

OS Interview Questions shows ads; Last Days Devs does not.

### Which is updated more often, OS Interview Questions or Last Days Devs?

OS Interview Questions ships an update every 95 months, and Last Days Devs every 6 months. Most recently, OS Interview Questions was updated on October 12, 2026 and Last Days Devs on October 8, 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.*