Lambda vs URL Editor
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lambda
This app helps musicians and sound engineers convert between musical notes, frequencies, and wavelengths. It features a dynamic fader, built-in oscillator, and frequency tracker with waveform display. Customize tuning standards and speed of sound for precise audio analysis.
- Convert notes, frequencies, wavelengths
- Dynamic fader for real-time adjustment
- Built-in oscillator with waveform
- Frequency tracker with waveform
- Customizable tuning standards
- Adjustable speed of sound
- Share data via standard methods
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Musicians and Sound Engineers. Musical Notes and Frequencies and Wavelengths. Now there's an app from dgApps to convert between them all. The app features a sliding fader to dynamically change frequency, wavelength and musical note, with locks to step through standard third octave frequencies or whole musical notes. There's a built in oscillator so you can hear the frequency, and a frequency tracker so the app can tell you the frequency. Both the oscillator and the frequency tracker display the audio waveform. A settings section allows for different tuning standards, and variations in the speed of sound. Lambda can also receive calculated Speed of Sound in Air values from another dgApps app, Cair. Lambda is now a universal app, equally at home on an iPhone as on an iPad. In Split Mode on an iPad device, side by side with Cair, the calculated Speed of Sound in Air is passed in real time to the Lambda app. Lambda allows you to share frequency/wavelength/note data via all the usual sharing methods.
URL Editor
This app helps you manage and modify URLs, making them shorter and more convenient. It allows you to edit components, remove tracking information for enhanced privacy, and even create links from scratch.
- Edit URL components
- Remove tracking information
- Resolve original URL via HEAD request
- Create URLs from scratch
- Integrate with Shortcuts app
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Nobody likes very long URLs that barely fit onto your screen. If you've ever gotten on of these in a message from a friend, you know that they are annoying and inconvenient. Not only that, but they usually contain a lot unnecessary information that is used to track you. And this where URLy comes in. URLy is beautiful URL editor that lets you modify any part of a given link that you pass in or create from scratch. Main features: - Resolve the original URL by quickly scheduling a HEAD request (this one's for the nerds) - Edit, delete or add components to the URL you're trying to share - Protect your privacy by quickly removing all tracking info from a URL - Use URLy's most common operations in the Shortcuts app to automate your sharing flow If you have any feedback or suggestions, please feel to leave a review or contact me on social media :) Terms and Conditions: https://panhans.dev/apps/urly/terms.html
Screenshots
Verdict
The clearest difference is price: URL Editor at Free against Lambda's $2.99. URL Editor also leads on update cadence (every 3 months vs every 54 months) and review sentiment (100% vs 80%). Lambda's advantage is in-app purchases (none vs 6) and iOS requirement (15.6 vs 26.0). On rating, ratings volume, ads 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
URL Editor is free to download; Lambda costs $2.99 up front. URL Editor sells 6 one-off in-app purchases. Lambda asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Lambda against 5.0 for URL Editor. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 80% of Lambda's written reviews are positive against 100% of URL Editor's.
Lambda ships an update every 54 months, URL Editor every 3 months. The most recent releases landed on September 17, 2026 and September 15, 2026 respectively.
| Parameter | Lambda | URL Editor |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 80.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 1 |
| Update frequency | Every 54 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 26.0 |
| Further details — not scored | ||
| Size | 6 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | dgApps | Henrik Panhans |
Customer experience
Lambda
URL Editor
In-app purchases
Lambda
No in-app purchases
URL Editor
- Medium Tip$0.99
- Small Tip$0.99
- Large Tip$3.99
Show 3 moreShow fewer
- Huge Tip$5.99
- Gigantic Tip$9.99
- Immense Tip$15.99









