# Sky vs TKLingo

The clearest difference is in-app purchases: Sky at none against TKLingo's 4. Sky also leads on iOS requirement (11.0 vs 15.0). TKLingo's advantage is update cadence (daily vs every 20 months). On price, ads and device support there is nothing between them.

Both are free to download. TKLingo sells 4 one-off in-app purchases. Sky asks for nothing beyond the download.

Sky ships an update every 20 months, TKLingo daily. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Sky | TKLingo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/sky-line/id1243488428/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 20 months | **Daily** |
| Monetization | Free | — |
| Size | 21 MB | 28 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TERRACOM S. A.](https://appshunter.io/developer/627896499) | [Shanghai PalmZen Wireless Technology Co.,Ltd](https://appshunter.io/developer/441512718) |

## What reviewers say

### Sky

[App page](https://appshunter.io/ios/app/sky-line/id1243488428)

This app allows managers to monitor guard activity in real time, send instructions, and generate detailed reports. Customers can also observe site status and recent guard actions. Reports can be emailed, saved as PDFs, or printed.

**Highlights:** Real-time guard activity monitoring, Send instructions to guards, Generate detailed reports, Email reports, Save reports as PDFs, Print reports wirelessly, Customer site status observation

**In-app purchases:** none


### TKLingo

[App page](https://appshunter.io/ios/app/tklingo/id6796593924)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 直播翻译时长300分钟 | $0.29 | one-time |
| 直播翻译时长60分钟 | $2.99 | one-time |
| 直播翻译时长720分钟 | $29.99 | one-time |
| 直播翻译时长9000分钟 | $299.99 | one-time |


## Frequently asked questions

### Is Sky free?

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

### Is TKLingo free?

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

### Do Sky or TKLingo have ads?

Neither Sky nor TKLingo shows ads.

### Which is updated more often, Sky or TKLingo?

Sky ships an update every 20 months, and TKLingo daily. Most recently, Sky was updated on October 7, 2026 and TKLingo on October 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.*