Sonar Ruler vs Silent Drop
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sonar Ruler
This experimental app uses your iPhone's speaker to send out sonic pulses and measures the echo to estimate distances up to 60 feet. It's a fun and innovative way to explore sonar principles, perfect for educational purposes or impressing friends with unique iPhone capabilities.
- Sonic distance measurement
- Up to 60 feet range
- Selectable units (feet, inches, meters)
- Custom saved settings
- Educational sonar demonstration
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Sonar Ruler is a winner in the Best App Ever Awards - "Most innovative use of iPhone hardware" category! The Amazing New Sonar Ruler is an experimental app that uses echoes to measure distances with your iPhone! It uses the same principles that dolphins use to find food! It sends a short pulse from the speaker and measures how long that pulse takes to bounce off of something and return to the phone. It then estimates how far away you are. Use two devices to find the distance between them, without any wifi connection! Use "quiet" mode - with ultrasonic frequencies most people can't hear! Impress your friends with what this unique app can accomplish using only an iphone! GIZMODO.com: "that's a damned neat trick for a phone to be able to do." Features: - Set Units to feet, inches, or meters - Custom saved settings for measuring in different environments If you're a teacher, this app is a great way to teach students the principles of sonar, and how sound propagates through air. Enjoy! Follow us on twitter @LaanLabs NOTE: This is an experimental app, although it can be quite accurate, any measurements taken should be verified before using them.
Silent Drop
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Silent Drop is your secure bridge for sharing files between any devices — fast, simple, and completely private. No cloud, no tracking, just direct transfer that works. TRANSFER MADE EASY - Import any file type — photos, videos, documents, and more - Send or receive with a single tap - Works across all your devices BUILT FOR PRIVACY - All transfers happen directly between devices. - No servers, no data collection — your files stay yours, always. FAST, CLEAN, RELIABLE - Instant connection, no setup needed - Share even large files in seconds - 100% local processing Start sharing the quiet way. Try Silent Drop: Secure Bridge today and keep your files truly yours. Privacy Policy: https://www.freeprivacypolicy.com/live/23c648d6-c753-4b1e-a77d-522aad848fc6 Terms of Use: https://www.freeprivacypolicy.com/live/1cd20d12-9976-4aa2-b97a-3e9137dde3c9
Screenshots
Verdict
The clearest difference is iOS requirement: Silent Drop at 16.0 against Sonar Ruler's 18.0. On price, ads, in-app purchases and device support 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.
| Parameter | Sonar Ruler | Silent Drop |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) — better | — |
| Positive reviews | 43.5% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 105 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Laan Labs | 琳 陆 |
Bugs and requests
Sonar Ruler
Reported bugs
10 issues- App crashes within 3 seconds of opening on iPhone 6 and older models
- Won't open on iOS 8.4 and later versions
- No chirping sound emitted on some devices
- Feedback loop and screaming noise on certain hardware
- Phone locks up requiring hard restart
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- Broken help video URL
- Measurements lock at same distance regardless of location
- Metric mode produces incorrect readings
- Incompatible with iPhone 4S, 5, and first-generation devices
- Inconsistent performance across different iPhone models
Requested features
11 requests- Room mapping by rotating phone in circle
- Vertical distance measurement capability
- Better ambient noise filtering
- Clearer, more intuitive user interface
- Optimized default settings (frequency, filter, chirp)
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- Larger, easier-to-manipulate sliders
- iPod Touch compatibility
- Automatic zoom functionality for measurements
- Visual indicator for when to use short vs long distance mode
- Better help video and documentation
- Accessibility features for blind users
Silent Drop
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sonar Ruler
No in-app purchases
Silent Drop
No in-app purchases
