# Sentry Smartlock Plus vs Syncster Mason ToDo

The clearest difference is update cadence: Syncster Mason ToDo at every 6 months against Sentry Smartlock Plus's every 12 months. Sentry Smartlock Plus's advantage is iOS requirement (13.0 vs 17.0). 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.

Sentry Smartlock Plus ships an update every 12 months, Syncster Mason ToDo every 6 months. The most recent releases landed on October 22, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Sentry Smartlock Plus | Syncster Mason ToDo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/sentry-smartlock-plus/id1555979016/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 6 months** |
| Monetization | Free | — |
| Size | 319 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Limson Marketing Inc.](https://appshunter.io/developer/1555979018) | [Alexius Academia](https://appshunter.io/developer/1209840214) |

## What reviewers say

### Sentry Smartlock Plus

[App page](https://appshunter.io/ios/app/sentry-smartlock-plus/id1555979016)

Control and access your smart lock using Bluetooth. Enjoy keyless convenience and configure your lock settings directly from your device.

**Highlights:** Keyless convenience, Bluetooth access, Smart lock configuration, Device access

**Features:** macOS Compatibility

**In-app purchases:** none


### Syncster Mason ToDo

[App page](https://appshunter.io/ios/app/syncster-mason-todo/id6469999060)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sentry Smartlock Plus free?

Sentry Smartlock Plus is free to download, with no in-app purchases.

### Is Syncster Mason ToDo free?

Syncster Mason ToDo is free to download, with no in-app purchases.

### Do Sentry Smartlock Plus or Syncster Mason ToDo have ads?

Neither Sentry Smartlock Plus nor Syncster Mason ToDo shows ads.

### Which is updated more often, Sentry Smartlock Plus or Syncster Mason ToDo?

Sentry Smartlock Plus ships an update every 12 months, and Syncster Mason ToDo every 6 months. Most recently, Sentry Smartlock Plus was updated on October 22, 2026 and Syncster Mason ToDo on October 14, 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.*