# SlideToLock vs EML & MSG Email File Viewer

The clearest difference is update cadence: SlideToLock at weekly against EML & MSG Email File Viewer's monthly. EML & MSG Email File Viewer's advantage is iOS requirement (17.0 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. SlideToLock sells 1 one-off in-app purchase and EML & MSG Email File Viewer sells 3 in-app purchases, starting at $1.00 per 7 days. Whichever you choose, the download price is not the number that matters.

SlideToLock ships an update weekly, EML & MSG Email File Viewer monthly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SlideToLock | EML & MSG Email File Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/slidetolock/id6746960176/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | — |
| Size | 21 MB | 18 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, Mac | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Continuum (France)](https://appshunter.io/developer/1675549371) | [Sheenu Jain](https://appshunter.io/developer/6784692835) |

## What reviewers say

### SlideToLock

[App page](https://appshunter.io/ios/app/slidetolock/id6746960176)

Instantly secure your Macs from your iPhone with a simple swipe. Monitor your Mac's status and even unlock it remotely with an experimental feature. Manage multiple Macs securely using your iCloud account.

**Highlights:** Remote Mac locking, Activity monitoring (heartbeat), Experimental unlock feature, Manage multiple Macs, Secure iCloud integration, Zero setup required

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Banner ads | $1.99 | one-time |


### EML & MSG Email File Viewer

[App page](https://appshunter.io/ios/app/eml-and-msg-email-file-viewer/id6795544592)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro — Weekly | $1.00 | per 7 days |
| Pro — Yearly | $7.99 | per year |
| Pro — Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is SlideToLock free?

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

### Is EML & MSG Email File Viewer free?

EML & MSG Email File Viewer is free to download, with in-app purchases available.

### Do SlideToLock or EML & MSG Email File Viewer have ads?

Neither SlideToLock nor EML & MSG Email File Viewer shows ads.

### Which is updated more often, SlideToLock or EML & MSG Email File Viewer?

SlideToLock ships an update weekly, and EML & MSG Email File Viewer monthly. Most recently, SlideToLock was updated on October 30, 2026 and EML & MSG Email File Viewer 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.*