Lambda vs FarFaces Security
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.
FarFaces Security
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Advanced mobile biometric matching technology for professional security companies. Up to 15m recognition from any mobile device. Alternative to CCTV.
Screenshots
Verdict
The clearest difference is price: FarFaces Security at Free against Lambda's $2.99. FarFaces Security also leads on update cadence (every 14 months vs every 54 months). Lambda's advantage is device support (3 vs 1). On ads, in-app purchases and iOS requirement 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
FarFaces Security is free to download; Lambda costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Lambda ships an update every 54 months, FarFaces Security every 14 months. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.
| Parameter | Lambda | FarFaces Security |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 80.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 54 months | Every 14 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 6 MB | 241 MB |
| Age rating | 4+ | 4+ |
| Developer | dgApps | BitCenter UK Ltd |
In-app purchases
Lambda
No in-app purchases
FarFaces Security
No in-app purchases
Questions
Is Lambda free?
Is FarFaces Security free?
Do Lambda or FarFaces Security have ads?
Which is updated more often, Lambda or FarFaces Security?
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