Sonar Ruler vs LaundryCash
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. >> Impress your friends with what this unique app can accomplish using only an iphone! << Ϟ GIZMODO.com: "that's a damned neat trick for a phone to be able to do." Features: * Sonic distance measurement up to 60 feet * 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. ** Watch a demo video here: http://bit.ly/sonarvideo ** German/Japanese subtitles here: http://bit.ly/sonarvid Enjoy! Follow us on twitter @laanlabs *This is an experimental app, although it can be quite accurate, any measurements taken should be verified before using them. Note: Use with iPads requires some adjustment to the chirp boundaries
LaundryCash
This app allows you to pay for coin-operated laundry machines using your mobile device. Load credit onto your account and activate machines remotely, eliminating the need for cash or quarters.
- Activate laundry machines via mobile
- Load credit onto account
- No need for quarters or cash
- Convenient laundry payment
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LaundryCash enables coin-operated laundry machines to be activated via a mobile application, removing the need for quarters or cash. With convenient options to load credit onto a LaundryCash account, users can forget about runs to the bank to do their laundry!
Screenshots
Verdict
The clearest difference is price: LaundryCash at Free against Sonar Ruler's $0.99. LaundryCash also leads on rating (5.0 vs 2.7) and update cadence (every 3 weeks vs every 94 months). Sonar Ruler's advantage is iOS requirement (8.1 vs 13.0). On ratings volume, 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
LaundryCash is free to download; Sonar Ruler costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LaundryCash holds the better App Store score, 5.0 against 2.7. Both are backed by a comparable volume of ratings — 3 and 2 respectively.
Sonar Ruler ships an update every 94 months, LaundryCash every 3 weeks. The most recent releases landed on October 27, 2026 and October 23, 2026 respectively.
| Parameter | Sonar Ruler | LaundryCash |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.7 (3 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 43.5% of reviews | — |
| Number of ratings | 3 — better | 2 |
| Update frequency | Every 94 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 8.1 — better | 13.0 |
| Further details — not scored | ||
| Size | 13 MB | 27 MB |
| Age rating | 4+ | 4+ |
| Developer | Laan Labs | Cashless Payments, LLC |
Customer experience
Sonar Ruler
LaundryCash
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
LaundryCash
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Sonar Ruler
No in-app purchases
LaundryCash
No in-app purchases
