# KTT 자가보안 vs BrewFocus

The clearest difference is in-app purchases: KTT 자가보안 at none against BrewFocus's 3. KTT 자가보안 also leads on iOS requirement (11.0 vs 17.0). BrewFocus's advantage is update cadence (weekly vs every 9 months). On price, ads and device support there is nothing between them.

Both are free to download. BrewFocus sells 3 in-app purchases, starting at $3.99 per month. KTT 자가보안 asks for nothing beyond the download.

KTT 자가보안 ships an update every 9 months, BrewFocus weekly. The most recent releases landed on November 4, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | KTT 자가보안 | BrewFocus |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Weekly** |
| Monetization | — | Freemium |
| Size | 44 MB | 703 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MGV Security System](https://appshunter.io/developer/1442050029) | [HYUNG SOON CHOI](https://appshunter.io/developer/1833172160) |

## What reviewers say

### KTT 자가보안

[App page](https://appshunter.io/ios/app/ktt/id6473464936)

**Features:** macOS Compatibility

**In-app purchases:** none


### BrewFocus

[App page](https://appshunter.io/ios/app/brewfocus-focus-in-a-cafe/id6782930933)

This app simulates a cafe environment to help you focus. Choose your virtual drink to set a focus session duration and enjoy ambient sounds and changing views to boost productivity.

**Highlights:** Cafe ambience simulation, Customizable focus session timer, Ambient soundscapes, Dynamic visual scenes, Focus history and stats, Multiple seating views

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Yearly | $19.99 | per year |
| Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is KTT 자가보안 free?

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

### Is BrewFocus free?

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

### Do KTT 자가보안 or BrewFocus have ads?

Neither KTT 자가보안 nor BrewFocus shows ads.

### Which is updated more often, KTT 자가보안 or BrewFocus?

KTT 자가보안 ships an update every 9 months, and BrewFocus weekly. Most recently, KTT 자가보안 was updated on November 4, 2026 and BrewFocus on November 1, 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.*