Sonar Ruler vs House Radar
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.
House Radar
Locate lost electronic devices within your home using Bluetooth and Wi-Fi signals. The app guides you with visual and audio cues, indicating proximity to your misplaced items. It can also identify devices connected to your Wi-Fi network.
- Locate Bluetooth devices
- Wi-Fi device scanner
- Proximity indicator (Warmer/Colder)
- Audio cues for finding items
- Optional whole-house finding with Mac
- Device naming and account sync
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House Radar finds the things in your home that send a signal — phones, earbuds, watches, TVs and speakers — and walks you to them. Open the app and Home tells you what you can do. Tap a card and go. FIND SOMETHING YOU LOST Pick the device and walk. The screen goes from cold blue to hot red as you get closer, with a word that says Warmer, Colder or Right here, and fast beeps when you are on it. When this iPhone can hear it on Bluetooth, an arrow points the way. New here? "How to find something" walks you through it in 6 steps. SEE WHAT'S ON YOUR WI-FI Quick scan lists the devices on the Wi-Fi you're on, with plain names — right from your iPhone. SEE BLUETOOTH AROUND YOU Earbuds, watches, speakers and trackers this phone can hear, closest first. WHOLE-HOUSE FINDING (OPTIONAL) Add a free home base on a Mac that stays on at home. House Radar then lists everything on your home network, flags what just came online, and shows the room for devices you place or that a listener in that room hears. Set up your home walks you through it. No Mac? Tap Try a demo house to see the full hunt with pretend devices. Name your devices once and they follow your account to any iPhone. Signal strength is a guide, not a tape measure — it ranks what is closer.
Screenshots
Verdict
The clearest difference is price: Sonar Ruler at Free against House Radar's $2.99. Sonar Ruler also leads on ratings volume (3 vs 1). House Radar's advantage is rating (5.0 vs 2.7) and update cadence (every 2 days vs every 105 months). On ads, in-app purchases, monetization model 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
Sonar Ruler is free to download; House Radar costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
House Radar holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
Sonar Ruler ships an update every 105 months, House Radar every 2 days. Both last shipped on November 10, 2026.
| Parameter | Sonar Ruler | House Radar |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 2.7 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 43.5% of reviews | — |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 105 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Laan Labs | Peter De Paola |
Customer experience
Sonar Ruler
House Radar
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
House Radar
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sonar Ruler
No in-app purchases
House Radar
No in-app purchases








