# Horizon Detection vs Daria Explorer

The clearest difference is rating: Daria Explorer at 5.0 against Horizon Detection's 1.0. Daria Explorer also leads on update cadence (weekly vs fortnightly). Horizon Detection's advantage is in-app purchases (none vs 2). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Daria Explorer sells 2 in-app purchases, starting at $0.99 per month. Horizon Detection asks for nothing beyond the download.

Daria Explorer holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Horizon Detection ships an update fortnightly, Daria Explorer weekly. The most recent releases landed on October 1, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Horizon Detection | Daria Explorer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/horizon-detection/id6511216202/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/daria-explorer/id6740679183/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 35 MB | 5 MB |
| Requires iOS | 17.7.2 | **17.4** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Hideaki Uchikoshi](https://appshunter.io/developer/1559575002) | [liangui song](https://appshunter.io/developer/1227354727) |

## What reviewers say

### Horizon Detection

[App page](https://appshunter.io/ios/app/horizon-detection/id6511216202)

This utility app identifies and highlights horizontal lines within an image. It's designed for users who need to analyze visual data for straight horizontal elements.

**Highlights:** Detects horizontal lines, Highlights detected lines, Image analysis tool, Simple interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Daria Explorer

[App page](https://appshunter.io/ios/app/daria-explorer/id6740679183)

This innovative app combines image browsing with programming to let users customize search conditions and find specific images online. It features a powerful web crawler to gather images from various platforms and supports multi-format downloads.

**Highlights:** Customizable search conditions via programming, Web crawler for extensive image resources, Multi-format image downloads, Local classified storage, Built-in programming modules

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Daria Monthly | $0.99 | per month |
| Daria Annual | $9.99 | per year |


## Frequently asked questions

### Is Horizon Detection free?

Horizon Detection is free to download, with no in-app purchases.

### Is Daria Explorer free?

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

### Which has better reviews, Horizon Detection or Daria Explorer?

Daria Explorer is rated higher. Horizon Detection averages 1.0 out of 5 from 1 ratings, while Daria Explorer averages 5.0 from 1 ratings.

### Do Horizon Detection or Daria Explorer have ads?

Both Horizon Detection and Daria Explorer show ads.

### Which is updated more often, Horizon Detection or Daria Explorer?

Horizon Detection ships an update fortnightly, and Daria Explorer weekly. Most recently, Horizon Detection was updated on October 1, 2026 and Daria Explorer on September 20, 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.*