# NTN SafetyOne vs StudyFoc.us

The clearest difference is in-app purchases: StudyFoc.us at none against NTN SafetyOne's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. NTN SafetyOne sells 3 in-app purchases, starting at $0.99 per month. StudyFoc.us asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 14, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | NTN SafetyOne | StudyFoc.us |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/studyfocus-pomodoro-timer/id6791058868/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Free |
| Size | 41 MB | 201 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nha Nguyen Trong](https://appshunter.io/developer/1878569908) | [nam tran](https://appshunter.io/developer/1444538920) |

## What reviewers say

### NTN SafetyOne

[App page](https://appshunter.io/ios/app/ntn-safetyone/id6759429809)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $0.99 | per month |
| Premium Yearly | $2.99 | per year |
| Premium Lifetime | $6.99 | one-time |


### StudyFoc.us

[App page](https://appshunter.io/ios/app/studyfocus-pomodoro-timer/id6791058868)

Enhance your study habits with a focus timer designed for deep work. Track time by subject, customize your focus sessions with flexible timer modes, and visualize progress with detailed reports. Stay motivated through friendly competition and group focus sessions.

**Highlights:** Focus timer for study and work, Track time by subject and task, Customizable focus sessions, Pomodoro and Pomoflow modes, Detailed progress reports, Leaderboard for accountability, Group focus sessions

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

**In-app purchases:** none


## Frequently asked questions

### Is NTN SafetyOne free?

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

### Is StudyFoc.us free?

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

### Do NTN SafetyOne or StudyFoc.us have ads?

Neither NTN SafetyOne nor StudyFoc.us shows ads.

### Which is updated more often, NTN SafetyOne or StudyFoc.us?

NTN SafetyOne ships an update weekly, and StudyFoc.us weekly. Most recently, NTN SafetyOne was updated on September 14, 2026 and StudyFoc.us on September 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*