# 주연테크911 vs tailf

The clearest difference is update cadence: 주연테크911 at every 2 days against tailf's every 5 days. 주연테크911 also leads on iOS requirement (10.2 vs 15.0). 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.

주연테크911 ships an update every 2 days, tailf every 5 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 주연테크911 | tailf |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 5 days |
| Size | 18 MB | 21 MB |
| Requires iOS | **10.2** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [JOOYON Electronics](https://appshunter.io/developer/1178884205) | [boim choi](https://appshunter.io/developer/1862063512) |

## What reviewers say

### 주연테크911

[App page](https://appshunter.io/ios/app/911/id1204062535)

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

**In-app purchases:** none


### tailf

[App page](https://appshunter.io/ios/app/tailf/id6808048845)

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

**In-app purchases:** none


## Frequently asked questions

### Is 주연테크911 free?

주연테크911 is free to download, with no in-app purchases.

### Is tailf free?

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

### Do 주연테크911 or tailf have ads?

Neither 주연테크911 nor tailf shows ads.

### Which is updated more often, 주연테크911 or tailf?

주연테크911 ships an update every 2 days, and tailf every 5 days. Most recently, 주연테크911 was updated on November 2, 2026 and tailf on October 31, 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.*