UniTuner vs Klaus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
UniTuner
This app provides precise chromatic tuning for a wide range of instruments. It offers advanced features like capo simulation, audio visualization, and a tone generator for accurate tuning and sound analysis. Explore over 200 tunings and customize your own for a personalized experience.
- Capo Simulation
- Accurate Cent Readout
- Tone Generator
- Audio Visualization (Spectrum)
- Tuning Map
- Over 200 Tunings
- Customizable Concert Pitch
Read full descriptionHide full description
Features: - Capo Simulation: Simulate a capo on your instrument while maintaining familiar results. - Accurate Cent Readout with Direct Feedback: No more guessing! Get precise 1/10th cent accuracy from bass to the highest note. - Tone Generator: Tune your drums or instrument by ear using the tone generator, which includes Sinewave, Triangle, and Square-Wave options. - Audio Visualization (Spectrum): View your instrument's harmonic spectrum for better understanding. - Tuning Map: The Tuning Map is a tool for tuning notes of instruments that only sound briefly. So, if the tuner doesn't show anything yet, you can already read out the pitch in the Tuning Map. - Timeline: Visualize the pitch in cents of the detected note. - Customizable Concert Pitch: Set your concert pitch from 220 Hz to 880 Hz. - Over 200 Tunings for String Instruments, including: Ahenk, Armonico, Arpeggione, Bağlama / Saz - long neck, Baglamas, Bajo Quinto, Bajo Sexto, Balalaika, Bandurria - Spanish, Banjo, Banjo - Bass, Banjo - Cello, Banjo - Contrabass, Banjo - Tenor, Banjolete, Bass (Doublebass), Bouzouki (trichordo), Bouzouki (tetrachordo), Cello, Cuban Laúd, Dotara, Dulcimer - 3 course, Dulcimer - 4 course, Fiddle, Gekkin, Guitalete, Guitar, Guitar - 12-String, Guitar - Baritone, Guitarrón, Halszither, Hurdy Gurdy, Irish Bouzouki, Jarana Huasteca, Kamancheh, Kithara Sarda, Kora, Koto, Laúd - Spanish, Laúd - Cuban, Laúd - Philippine, Mandobass - 4 String, Mandobass - 8 String, Mandocello, Mandola, Mandolin, Nevoud, Oud, Pedal Steel Guitar, Pipa, Portuguese Guitar, Qinqin, Requinto, Russian Guitar, Setar, Ukulele, Ukulele - Baritone, Ukulele - Bass, Ukulele - Soprano, Vihuela, Viol (Baritone, Bass, Contrabass, Soprano, Tenor, Treble), Viola, Violin, Violin - Tenor, Xiaoruan, Yueqin, Zheng - "Perfect 5th" tuning for: Violin, Viola, Cello, Double bass. - Tone Names: English, German, Japanese, Fixed & Movable Solfège - Choose from Various Tuning Systems for Open Tunings or Historical Instruments: Just Intonation, Pythagorean, Meantone, and many more. You can also create and store your own custom temperaments. - Enhance Your Open Tunings with Just Intonation: Experience the unique sound quality of pure tuning by setting the UniTuner to Just Intonation and the root note of your tuning
Klaus
Read full descriptionHide full description
Mit der App für Klaus - Die Hackbrett Maus stimmst du dein Hackbrett schnell und präzise. Die App erkennt die Tonhöhe in Echtzeit und unterstützt dich beim genauen Stimmen deiner Saiten – einfach, übersichtlich und speziell fürs Käsehackbrett entwickelt.
Screenshots
Verdict
The clearest difference is in-app purchases: Klaus at none against UniTuner's 5. Klaus also leads on iOS requirement (12.0 vs 15.6). On price, update cadence, 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
Both are free to download. UniTuner sells 5 one-off in-app purchases. Klaus asks for nothing beyond the download.
UniTuner ships an update every 2 months, Klaus monthly. The most recent releases landed on November 3, 2026 and October 25, 2026 respectively.
| Parameter | UniTuner | Klaus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (141 ratings) — better | — |
| Positive reviews | 93.5% of reviews | — |
| Number of ratings | 141 — better | — |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 4 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Klaus Fecker | Markus Stradner |
In-app purchases
UniTuner
- Silver Supporter$1.99
- Gold Supporter$3.99
- Purple Supporter$5.99
Show 2 moreShow fewer
- Emerald Supporter$7.99
- Sapphire Supporter$24.99
Klaus
No in-app purchases









