Sing vs KQ Tixie
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
Read full descriptionHide full description
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.
KQ Tixie
This app is a 4-operator FM synthesizer for iOS devices, recreating the iconic sounds of 1980s hardware. It offers a modern interface with MPE support and AUv3 compatibility, allowing for deep sound editing and layering up to eight sounds.
- 4-operator FM synthesis recreation
- MPE and AUv3 support
- Import SysEx data
- Thousands of patches included
- Layer up to 8 sounds
- Real-time performance controls
- Built-in effects
Read full descriptionHide full description
KQ Tixie is a 4-operator FM synthesizer for iPhone and iPad that faithfully recreates the sound and behavior of classic FM instruments from the 1980s. Experience the iconic character of vintage FM synthesis with a modern touch interface, MPE support, and AUv3 compatibility. FM synthesis generates sound mathematically rather than playing back recorded samples. 4-operator FM is not simply a smaller version of 6-operator FM. With fewer operators, sound design becomes more immediate and intuitive, making it easier to reach the sound you want without unnecessary complexity. Despite its streamlined architecture, 4-operator FM is capable of producing powerful basses, sparkling bells, rich electric pianos, cutting leads, and many of the iconic sounds that defined an era. KQ Tixie faithfully recreates the character and workflow that make 4-operator FM unique. It's not about having fewer operators—it's about a more refined design. 4-operator FM is another evolution of FM synthesis. Features - Faithful recreation of classic 4-operator FM synthesizers from the 1980s - Import SysEx data from supported hardware synthesizers and reproduce their sounds accurately - Includes thousands of patches - User-friendly sound editor designed for efficient patch creation and editing - Layer up to 8 sounds simultaneously - Supports MPE (Pitch-bend, Aftertouch, and MIDI CC#74) - Real-time performance controls for expressive sound shaping - Built-in effects inspired by the Yamaha V50 and Korg DS-8 - AUv3 Instrument support - iCloud support - Patches edited in KQ Tixie can be transferred to compatible DX-series synthesizers (excluding the DX7 and DX9), earlier EOS-series synthesizers, FB-01, Reface DX, and SEQTRAK. * - Users can download a VST3 Wrapper for supported Macs. *The Reface DX and SEQTRAK engines cannot reproduce the operator waveforms or feedback behavior. Choose KQ Tixie if you want: - The sound of Yamaha DX100, TX81Z, V50, FB-01. - 4-operator FM synthesis with all eight operator waveforms. - Built-in effects inspired by the Yamaha V50 and Korg DS-8. - Compatibility with SysEx data from supported hardware synthesizers. Compatible synthesizers include - Yamaha FB-01 - Yamaha DX21 / DX27 / DX100 / DX11 / V50 / TX81Z / WT11 - Yamaha EOS YS200 / YS100 / B200 / DS55 / TQ5 - Korg DS-8 / 707 Names of hardware synthesizers and manufacturers mentioned in this description are trademarks of their respective owners. The developer of this app is independent of those companies. This app and its accompanying description include AI-generated text.
Screenshots
Verdict
The clearest difference is rating: KQ Tixie at 5.0 against Sing's 3.0. KQ Tixie also leads on update cadence (every 3 days vs every 6 months) and review sentiment (71% vs 63%). Sing's advantage is price ($4.99 vs $8.99). On ads, in-app purchases, monetization model 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
Sing costs $4.99 and KQ Tixie $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.
KQ Tixie holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 6 respectively. Written reviews point the same way: 63% of Sing's written reviews are positive against 71% of KQ Tixie's.
Sing ships an update every 6 months, KQ Tixie every 3 days. The most recent releases landed on October 31, 2026 and November 5, 2026 respectively.
| Parameter | Sing | KQ Tixie |
|---|---|---|
| Price | $4.99 — better | $8.99 |
| Rating | 3.0 (2 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 62.5% of reviews | 71.4% of reviews — better |
| Number of ratings | 2 | 6 — better |
| Update frequency | Every 6 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | HotPaw Productions | Ryouta Kira |
Customer experience
Sing
KQ Tixie
In-app purchases
Sing
No in-app purchases
KQ Tixie
No in-app purchases









