# Underlayer vs StegInsight

The clearest difference is price: Underlayer at Free against StegInsight's $2.99. StegInsight's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Underlayer is free to download; StegInsight costs $2.99 up front. Underlayer sells 1 in-app purchase, starting at $2.99 per 7 days. StegInsight asks for nothing beyond the download.

Underlayer ships an update every 5 months, StegInsight weekly. The most recent releases landed on September 12, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Underlayer | StegInsight |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/steginsight/id6759777643/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Weekly** |
| Monetization | — | Paid |
| Best chart rank | — | **#182** |
| Size | 169 MB | 1 MB |
| Requires iOS | **15.1** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 9+ |
| Developer | [Mihail Rukavishnikov](https://appshunter.io/developer/1648782212) | [Hangzhou Lake Snow Technology Co., Ltd.](https://appshunter.io/developer/1439688130) |

## What reviewers say

### 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 |


### StegInsight

[App page](https://appshunter.io/ios/app/steginsight/id6759777643)

**Currently charting:** #182 Top Paid · Utilities (US App Store)

Analyze images for hidden text using steganography techniques. Embed or extract messages within image pixels or appended data. Visualize image layers and learn about steganographic concepts.

**Highlights:** LSB Steganography (embed/extract text), LSB Bit-Plane Visualization, Trailing Data Detection (EOF), Dual Embedding Modes (LSB/EOF), Cross-Platform (iOS, macOS), Built-in Steganography Guide

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Underlayer free?

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

### Is StegInsight free?

StegInsight costs $2.99, with no in-app purchases.

### Do Underlayer or StegInsight have ads?

Underlayer shows ads; StegInsight does not.

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

Underlayer ships an update every 5 months, and StegInsight weekly. Most recently, Underlayer was updated on September 12, 2026 and StegInsight on September 9, 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.*