# Smartin lock vs StaySync

The clearest difference is in-app purchases: Smartin lock at none against StaySync's 2. Smartin lock also leads on iOS requirement (8.0 vs 16.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. StaySync sells 2 in-app purchases, starting at $2.99 per month. Smartin lock asks for nothing beyond the download.

Smartin lock ships an update monthly, StaySync every 2 weeks. The most recent releases landed on September 19, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Smartin lock | StaySync |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Size | 35 MB | 2 MB |
| Requires iOS | **8.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MARINOS AIMONIOTIS](https://appshunter.io/developer/1495174045) | [Yasunori Tanaka](https://appshunter.io/developer/1323722042) |

## What reviewers say

### Smartin lock

[App page](https://appshunter.io/ios/app/smartin-lock/id1495174046)

**Features:** macOS Compatibility

**In-app purchases:** none


### StaySync

[App page](https://appshunter.io/ios/app/staysync/id6744273477)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month Plan | $2.99 | per month |
| 1-Year Plan | $29.99 | per year |


## Frequently asked questions

### Is Smartin lock free?

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

### Is StaySync free?

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

### Do Smartin lock or StaySync have ads?

Neither Smartin lock nor StaySync shows ads.

### Which is updated more often, Smartin lock or StaySync?

Smartin lock ships an update monthly, and StaySync every 2 weeks. Most recently, Smartin lock was updated on September 19, 2026 and StaySync on September 9, 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.*