TUNIC Guitar Tuner vs Kritus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TUNIC Guitar Tuner
This app offers a unique tuning system called StopperStimmung, designed to create a clear and pure sound on stringed instruments. It provides variable pitch, common open tuning templates, and high sensitivity for precise adjustments.
- StopperStimmung unique tuning system
- Variable pitch (415-460 Hz)
- Selection of common open tunings
- High sensitivity tuning (0.012 cent resolution)
- Capo support (fret 1-5)
- Saddle compensation verification
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The TUNIC Guitar Tuner, exclusively features StopperStimmung, a slightly stretched tuning invented by the German piano maker Bernhard Stopper in 1988. It creates an amazing and clear sound on your instrument by the tunings stunning structural symmetry, making chords to appear as being pure tuned. FEATURES: Provides variable pitch (415-460 Hz), a selection of common open tuning templates (Classic, Classic half step down, Open E, Open G, Open D, Open C, DADGAD, Dropped D, Dobro) and highest sensitivity (until 0.012 cent resolution). Capo use on fret 1-5 supported, what also allows verification of saddle compensation for optimal nut height / nut distance on fret 1. SOUND EXAMPLE: Listen to Thomas Maos´ Dobro guitar on the music album "Larger Than Life" (Silent Art Orchestra), which was tuned with TUNIC Guitar: http://itunes.apple.com/WebObjects/MZStore.woa/wa/viewAlbum?id=315192140&s=143443 HOW TO USE: To change the pitch, tap on the buttons above the '440.0' and edit its value as desired. Green position indicator: Fine tuning resolution: 0.025 cent (0.012 cent for iPhone 4 and above) in a visible range of +-5 cent Yellow position indicator: Coarse tuning resolution: 0.25 cent (0.012 cent for iPhone 4 and above) in a visible range of +-50 cent Pluck the string to be tuned about one time per second, while muting the other strings. To handle the fine tuning indicator on this extreme precision level, measure the pitch by very small or no string tension changes. This requires some experience even for professionals but is honoured by an uncomparable sound experience. Always tune your instrument in 2-3 cycles, as every change of one string affects the other strings. Tune your instrument often to achieve a good tuning stability. Pluck the string with a plectrum to produce an overtone rich sound with the microphone close to the instrument. TERMS OF USE: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Kritus
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Real musical ability lives in your ears — not on a page. Kritus is not music theory, and it is not lessons. It doesn't ask you to read, memorize, or recite. It trains the one thing every musician actually runs on — the ear. You hear a note, a chord, or a phrase, then find it on your instrument by sound alone. NO BACKGROUND NEEDED — AND NO WAY AROUND IT You don't need to read music. You don't need theory, or years behind you. But if you want to truly hear — to play what you imagine, pick out the music you love, and find your way through any song — there is only one path, and your ears have to walk it. Kritus is that path, from your very first note. PUT THE PAGE AWAY No sheet music. No fretboard diagrams. No keyboard maps. Kritus never shows you where to put your fingers, because reading the answer is not the same as hearing it. You listen, you search for it on your instrument, and you play it back — the microphone checks what you played, entirely on your device. WHAT YOU'LL PRACTICE - Single notes, intervals, chords, phrases, and full chord progressions. - Chords that open up: when one is hard to hear, its voices gradually separate so you can catch each on its own, then settle back into a single sound. - The River, which carries you through everything in the order real music actually uses it — practice and review woven together, always moving. - Guitar or piano, with reference sounds recorded from real instruments. A built-in guitar tuner, too. PRIVATE BY DESIGN Microphone audio is analyzed on your device in real time and immediately discarded — never recorded, saved, or uploaded. No accounts, no ads, no analytics. SUBSCRIPTION Kritus Serious User unlocks the whole app after a 7-day free trial: - Monthly — $8.99 / month - Annual — $49.99 / year Payment is charged to your Apple ID at confirmation and shown in your local currency. The subscription renews automatically at the price shown unless cancelled at least 24 hours before the current period ends. Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://kritus.marcuslabs.ai/privacy
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Verdict
The clearest difference is price: Kritus at Free against TUNIC Guitar Tuner's $0.99. Kritus also leads on update cadence (fortnightly vs every 14 months). TUNIC Guitar Tuner's advantage is in-app purchases (none vs 2) and iOS requirement (9.0 vs 17.0). On 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
Kritus is free to download; TUNIC Guitar Tuner costs $0.99 up front. Kritus sells 2 in-app purchases, starting at $8.99 per month. TUNIC Guitar Tuner asks for nothing beyond the download.
TUNIC Guitar Tuner ships an update every 14 months, Kritus fortnightly. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.
| Parameter | TUNIC Guitar Tuner | Kritus |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 14 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 132 MB |
| Age rating | 4+ | 4+ |
| Developer | Patrick Sebastian Stopper | Mi Lin |
In-app purchases
TUNIC Guitar Tuner
No in-app purchases
Kritus
- Kritus Serious User (Monthly)7 Days trial$8.991 Month
- Kritus Serious User (Annual)7 Days trial$49.991 Year
Questions
Is TUNIC Guitar Tuner free?
Is Kritus free?
Do TUNIC Guitar Tuner or Kritus have ads?
Which is updated more often, TUNIC Guitar Tuner or Kritus?
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