# STM vs BK Precision Link

The clearest difference is in-app purchases: BK Precision Link at none against STM's 10. BK Precision Link also leads on update cadence (every 2 weeks vs every 2 months) and iOS requirement (12.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. STM sells 10 in-app purchases, starting at $5.99 per month. BK Precision Link asks for nothing beyond the download.

STM ships an update every 2 months, BK Precision Link every 2 weeks. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | STM | BK Precision Link |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Size | 15 MB | 9 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Miciniti Nigeria Ltd](https://appshunter.io/developer/889715682) | [B&K Precision](https://appshunter.io/developer/400501706) |

## What reviewers say

### STM

[App page](https://appshunter.io/ios/app/stm-screentime-manager/id1447876325)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Personal Month (3 screens) | $5.99 | per month |
| Personal Year (1 screen) | $19.99 | per year |
| Personal Year (2 screens) | $39.99 | per year |
| Professional Year (1 screen) | $49.99 | per year |
| Personal Year (3 screens) | $59.99 | per year |
| Enterprise Year (1 screen) | $99.99 | per year |
| Professional Year (2 screens) | $99.99 | per year |
| Professional Year (3 screens) | $149.99 | per year |
| Enterprise Year (2 screen) | $199.99 | per year |
| Enterprise Year (1 screen) | $299.99 | per year |


### BK Precision Link

[App page](https://appshunter.io/ios/app/bk-precision-link/id6449451300)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is STM free?

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

### Is BK Precision Link free?

BK Precision Link is free to download, with no in-app purchases.

### Do STM or BK Precision Link have ads?

Neither STM nor BK Precision Link shows ads.

### Which is updated more often, STM or BK Precision Link?

STM ships an update every 2 months, and BK Precision Link every 2 weeks. Most recently, STM was updated on November 2, 2026 and BK Precision Link on October 27, 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.*