App Lock vs Horizon Detection
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
App Lock
Secure your sensitive data and apps with a smart password lock. Protect your privacy by selecting which applications require a password for access. Features timed and location-based locking for enhanced security.
- Password lock for app access
- Select specific apps to lock
- One-click locking of selected apps
- Timed and location-based locking
- Simple and intuitive interface
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This is a smart app lock designed to protect your privacy and sensitive data. Use password lock technology to ensure that only authorized users can access your apps and data. Password Guard: Unlock apps quickly and securely with a custom password. Custom Lock: Select the apps you want to lock to protect your privacy. One-click lock: Lock all selected apps quickly and easily. Timed location lock: Automatically lock based on custom time and location. Simple interface: Intuitive and easy to use, you can start protecting your privacy without complicated settings. Protect your social media and other sensitive apps from prying eyes. Provide an extra layer of security for your personal data, even if the device is lost. Suitable for parents to ensure that children are not exposed to inappropriate content.
Horizon Detection
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.
- Detects horizontal lines
- Highlights detected lines
- Image analysis tool
- Simple interface
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Detect horizontal lines in an image
Screenshots
Verdict
The clearest difference is rating: App Lock at 3.5 against Horizon Detection's 1.0. App Lock also leads on ratings volume (12 vs 1). Horizon Detection's advantage is update cadence (fortnightly vs monthly). On price, ads, in-app purchases and monetization model there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
App Lock holds the better App Store score, 3.5 against 1.0. That said, the two scores are not equally well evidenced: App Lock has 12 ratings behind it against 1, so its average is the more settled of the two.
App Lock ships an update monthly, Horizon Detection fortnightly. Both last shipped on October 30, 2026.
| Parameter | App Lock | Horizon Detection |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (12 ratings) — better | 1.0 (1 ratings) |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | 12 — better | 1 |
| Update frequency | Monthly | Fortnightly — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.7.2 |
| Further details — not scored | ||
| Size | 21 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | 小锋 张 | Hideaki Uchikoshi |
Customer experience
App Lock
Horizon Detection
In-app purchases
App Lock
No in-app purchases
Horizon Detection
No in-app purchases
Questions
Is App Lock free?
Is Horizon Detection free?
Which has better reviews, App Lock or Horizon Detection?
Do App Lock or Horizon Detection have ads?
Which is updated more often, App Lock or Horizon Detection?
Other comparisons
