# Secure Text Message vs Underlayer

The clearest difference is in-app purchases: Secure Text Message at none against Underlayer's 1. Secure Text Message also leads on ads (none vs shown) and iOS requirement (7.1 vs 15.1). Underlayer's advantage is update cadence (every 5 months vs every 36 months). On price and device support there is nothing between them.

Both are free to download. Underlayer sells 1 in-app purchase, starting at $2.99 per 7 days. Secure Text Message asks for nothing beyond the download.

Secure Text Message ships an update every 36 months, Underlayer every 5 months. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Secure Text Message | Underlayer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/secure-text-message/id561942822/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 36 months | **Every 5 months** |
| Monetization | Free | — |
| Size | 27 MB | 169 MB |
| Requires iOS | **7.1** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Geekme](https://appshunter.io/developer/823506026) | [Mihail Rukavishnikov](https://appshunter.io/developer/1648782212) |

## What reviewers say

### Secure Text Message

[App page](https://appshunter.io/ios/app/secure-text-message/id561942822)

This app provides a secure method for sending private messages. It allows users to encrypt and decrypt text using a password, then send it directly via text message or email. Saved messages can also be copied to the clipboard.

**Highlights:** Encrypt and decrypt messages, Send as text message, Send as email, Save to clipboard, Landscape and portrait modes, Password protection

**Features:** Vision Pro support

**In-app purchases:** none


### Underlayer

[App page](https://appshunter.io/ios/app/underlayer/id6753363956)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per 7 days |


## Frequently asked questions

### Is Secure Text Message free?

Secure Text Message is free to download, with no in-app purchases.

### Is Underlayer free?

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

### Do Secure Text Message or Underlayer have ads?

Underlayer shows ads; Secure Text Message does not.

### Which is updated more often, Secure Text Message or Underlayer?

Secure Text Message ships an update every 36 months, and Underlayer every 5 months. Most recently, Secure Text Message was updated on September 30, 2026 and Underlayer on October 1, 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.*