# Inmate Inbox vs Mobile Digital Secure

The clearest difference is in-app purchases: Mobile Digital Secure at none against Inmate Inbox's 4. Mobile Digital Secure also leads on iOS requirement (12.0 vs 15.6). Inmate Inbox's advantage is update cadence (every 2 months vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Inmate Inbox sells 4 one-off in-app purchases. Mobile Digital Secure asks for nothing beyond the download.

Inmate Inbox ships an update every 2 months, Mobile Digital Secure every 6 months. The most recent releases landed on July 21, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Inmate Inbox | Mobile Digital Secure |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.1 (88 ratings)](https://appshunter.io/ios/app/inmate-inbox/id1390513826/reviews)** | — |
| Number of ratings | **88** | — |
| Positive reviews | 16.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free with in-app purchases | — |
| Size | 34 MB | 43 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stewart](https://appshunter.io/developer/1390513825) | [WESTIXX PTE. LTD.](https://appshunter.io/developer/1210262615) |

## What reviewers say

### Inmate Inbox

[App page](https://appshunter.io/ios/app/inmate-inbox/id1390513826)

This app facilitates real-time communication between users and incarcerated individuals. It allows for sending and receiving messages, as well as sharing photos, helping to maintain connections with loved ones.

**Highlights:** Real-time messaging, Photo sending, Account management, Contact list management, Stay connected on the go

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| inmateinbox | $5.99 | one-time |
| InmateInbox | $10.99 | one-time |
| InmateInbox | $15.99 | one-time |
| InmateInbox | $20.99 | one-time |


### Mobile Digital Secure

[App page](https://appshunter.io/ios/app/mobile-digital-secure/id6447430639)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Inmate Inbox free?

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

### Is Mobile Digital Secure free?

Mobile Digital Secure is free to download, with no in-app purchases.

### Do Inmate Inbox or Mobile Digital Secure have ads?

Neither Inmate Inbox nor Mobile Digital Secure shows ads.

### Which is updated more often, Inmate Inbox or Mobile Digital Secure?

Inmate Inbox ships an update every 2 months, and Mobile Digital Secure every 6 months. Most recently, Inmate Inbox was updated on July 21, 2026 and Mobile Digital Secure on September 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.*