# Sonar Ruler vs LaundryCash

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.

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.

## The numbers

| Metric | Sonar Ruler | LaundryCash |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [2.7 (3 ratings)](https://appshunter.io/ios/app/sonar-ruler/id324621243/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/laundrycash/id6472733335/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 43.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 94 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 13 MB | 27 MB |
| Requires iOS | **8.1** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Laan Labs](https://appshunter.io/developer/310916919) | [Cashless Payments, LLC](https://appshunter.io/developer/1717655998) |

## What reviewers say

### Sonar Ruler

[App page](https://appshunter.io/ios/app/sonar-ruler/id324621243)

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.

**Highlights:** Sonic distance measurement, Up to 60 feet range, Selectable units (feet, inches, meters), Custom saved settings, Educational sonar demonstration

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Innovative sonar technology using iPhone hardware
- 🎯 Accurate measurements when used correctly (±0.5-1 inch)
- 📚 Educational value for learning sound principles
- 🎮 Fun novelty app for impressing friends
- ⚙️ Customizable settings for different environments

**What reviewers complain about**

- 🐛 Crashes immediately on many iPhone models
- ❌ Doesn't work on older iPhone generations (iPhone 4, 4S, 5)
- 🔊 Highly sensitive to background noise and interference
- 😕 Steep learning curve and unintuitive interface
- ⚠️ Inconsistent and unreliable measurements

**Reported bugs**

- 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

**Requested features**

- 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)


### LaundryCash

[App page](https://appshunter.io/ios/app/laundrycash/id6472733335)

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.

**Highlights:** Activate laundry machines via mobile, Load credit onto account, No need for quarters or cash, Convenient laundry payment

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Sonar Ruler free?

Sonar Ruler costs $0.99, with no in-app purchases.

### Is LaundryCash free?

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

### Which has better reviews, Sonar Ruler or LaundryCash?

LaundryCash is rated higher. Sonar Ruler averages 2.7 out of 5 from 3 ratings, while LaundryCash averages 5.0 from 2 ratings.

### Do Sonar Ruler or LaundryCash have ads?

Neither Sonar Ruler nor LaundryCash shows ads.

### Which is updated more often, Sonar Ruler or LaundryCash?

Sonar Ruler ships an update every 94 months, and LaundryCash every 3 weeks. Most recently, Sonar Ruler was updated on October 27, 2026 and LaundryCash on October 23, 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.*