Sing vs TUNIC Guitar Tuner
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sing
Visualize your singing or instrument playing pitch with a color-coded graph. This app analyzes audio input to show if you are on, sharp, or flat, helping you train your ear for accurate intonation.
- Color-coded pitch graph
- Real-time audio analysis
- Visualizes pitch accuracy
- Supports singing and instruments
- Pitch frequency spectrum display
- Monophonic pitch detection
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Can you sing in tune? Learn to sing (or play an instrument) accurately in tune with HotPaw Sing-inTuna's color-coded pitch graph. Sing-inTuna uses the built-in microphone on your iPhone or iPad to analyze and help you visualize if you are singing, or playing a musical instrument (such as a violin), precisely on the right pitch. It graphs pitch on a scrolling graph resembling a musical Grand Staff. Tones that are on-pitch (+-20 cents) are colored green; notes slightly sharp: red; notes a pinch flat: blue. You can also display an optional pitch frequency spectrum of your voice to see your timbre. Sing-inTuna requires a quiet environment with no accompaniment or harmony, and monophonic pitches that are at least a quarter second long. The pitch range using the built-in mic is about +-2 octaves from middle-C, depending on microphone use, loudness, and timbre. Note: This app produces no sounds and shows no sheet music. It only listens so that you can see your pitch, and how well your pitch matches that of a well tuned equal-temperament instrument.
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/
Screenshots
Verdict
The clearest difference is rating: TUNIC Guitar Tuner at 5.0 against Sing's 3.0. TUNIC Guitar Tuner also leads on price ($0.99 vs $4.99) and iOS requirement (9.0 vs 15.6). Sing's advantage is update cadence (every 6 months vs every 14 months). On ratings volume, ads, in-app purchases and monetization model 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
Sing costs $4.99 and TUNIC Guitar Tuner $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TUNIC Guitar Tuner holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 2 respectively.
Sing ships an update every 6 months, TUNIC Guitar Tuner every 14 months. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.
| Parameter | Sing | TUNIC Guitar Tuner |
|---|---|---|
| Price | $4.99 | $0.99 — better |
| Rating | 3.0 (2 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 62.5% of reviews | — |
| Number of ratings | 2 | 2 |
| Update frequency | Every 6 months — better | Every 14 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 9.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | HotPaw Productions | Patrick Sebastian Stopper |
Customer experience
Sing
TUNIC Guitar Tuner
In-app purchases
Sing
No in-app purchases
TUNIC Guitar Tuner
No in-app purchases









