# Stegg vs Underlayer

The clearest difference is ads: Stegg at none against Underlayer's shown. Stegg also leads on update cadence (every 3 months vs every 5 months) and iOS requirement (13.0 vs 15.1). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Stegg sells 1 one-off in-app purchase and Underlayer sells 1 in-app purchase, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Stegg ships an update every 3 months, Underlayer every 5 months. The most recent releases landed on August 2, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Stegg | Underlayer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/stegg/id1487379535/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 169 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [RUNEWORKS LLC](https://appshunter.io/developer/1487379534) | [Mihail Rukavishnikov](https://appshunter.io/developer/1648782212) |

## What reviewers say

### Stegg

[App page](https://appshunter.io/ios/app/stegg/id1487379535)

This app allows you to embed secret messages within any digital image, keeping the photo visually unchanged. Only those with the app can reveal the hidden text. Advanced features offer enhanced privacy and disguise options.

**Highlights:** Hide messages within images, Visually identical images, Password protection for messages, Disguise app as calculator (Pro), Hide images within images (Pro), Customizable app themes (Pro)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Stegg Pro | $4.99 | one-time |


### 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 Stegg free?

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

### Is Underlayer free?

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

### Do Stegg or Underlayer have ads?

Underlayer shows ads; Stegg does not.

### Which is updated more often, Stegg or Underlayer?

Stegg ships an update every 3 months, and Underlayer every 5 months. Most recently, Stegg was updated on August 2, 2026 and Underlayer on September 12, 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.*