Sing vs Addictive Pro
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.
Addictive Pro
This app offers a powerful hybrid synthesis engine for creating complex and dynamic sounds. Explore wavetable, noise, virtual analog, and FM synthesis with extensive modulation and effects. It includes a polyrhythm arpeggiator and real-time control options for musical inspiration and sound design.
- Hybrid synthesis engine
- Wavetable spectrum synthesis
- Virtual Analog synthesis
- Polyrhythm Arpeggiator
- Real-time parameter control
- Studio-standard effects section
- AudioUnit Instrument support
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The hybrid synthesis algorithm on which Addictive Pro is based provides you with efficient means for easy control of complex sounds far beyond usual sound synthesis methods: Addictive Pro provides you a with unique form of Wavetable oscillators. These Wavetables are generated from the harmonic content and the free digital filter structure entered by the user. The sound of up to 12 of this Wavetable oscillators is then further refined with a classic analog filter available in several 24dB and 12dB forms. For the optional noise part of the sound you can use the same sophisticated digital filter struct as for the wavetable oscillators allowing for a vast variety of ever changing noisescapes. The intelligent sound and rhythm randomizer can be applied to different sound aspects separately for really useful sound design and inspiration. A four part polyrhythm Arpeggiator creates complex rhythmical structures with a touch of a finger. Features: Hybrid synthesis engine • Wavetable spectrum synthesis • Noise spectrum synthesis • Virtual Analog synthesis • FM and Ringmodulation synthesis Synthesizer details • Twelve wavetable spectrum oscillators per voice. • Morphing between two wave/filter sets. • Waves contain up to 256 partials. • Hand drawn filter structure. • Spectral noise generator using hand drawn filter structure. • Ten major sound parameters each with independent poly LFO and envelope modulators. • Real time parameter control using two X/Y touch pads, the tilt sensors of the iPad and MIDI Controllers. • Monophonic or polyphonic with up to 16 voices. • 300 factory presets, unlimited user presets can be shared. Effect section • Seven studio standard effects concurrently usable: • Oversampled distortion with four different algorithms for antialiased sound. • Low / High equalizer • 8 pole analog Phaser • Flanger • Four line chorus • Stereo/Ping-Pong delay with glitch free delay time change. • Hi end reverberation unit. Four part Polyrhythm Arpeggiator • Uses programmable sequences with up to 32 steps. • Can trigger single notes and chords. • Unique randomizer generates Arpeggios with 100% usability. • Factory arpeggios included, unlimited user arpeggios possible. • For each step you can program tie, accent, transposition and note order Global • Play melodies live with the onscreen keyboard. Unique drag function for slides and vibrato. • AudioUnit Instrument • Audiobus 2 with state saving • Inter App Audio • Ableton Link support • Can use CoreMIDI compatible MIDI Keyboard. • Select from dozens of scales and play them with scale optimized keyboard layout. • Audio recorder with share function. • Share user presets. • Support for virtual MIDI input connections. • Multichannel MIDI Learn for external MIDI controllers. • Ableton Link compatible. • MIDI Tempo sync. Start/Stop Arpeggio. • MIDI bank/program change. • Import function for Addictive Synth presets. • File sharing of presets via iTunes possible
Screenshots
Verdict
The clearest difference is rating: Addictive Pro at 4.7 against Sing's 3.0. Addictive Pro also leads on update cadence (every 2 weeks vs every 6 months) and review sentiment (75% vs 63%). Sing's advantage is device support (3 vs 1) and price ($4.99 vs $5.99). On 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 Addictive Pro $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Addictive Pro holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Addictive Pro has 19 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 63% of Sing's written reviews are positive against 75% of Addictive Pro's.
Sing ships an update every 6 months, Addictive Pro every 2 weeks. The most recent releases landed on October 8, 2026 and October 21, 2026 respectively.
| Parameter | Sing | Addictive Pro |
|---|---|---|
| Price | $4.99 — better | $5.99 |
| Rating | 3.0 (2 ratings) | 4.7 (19 ratings) — better |
| Positive reviews | 62.5% of reviews | 75.0% of reviews — better |
| Number of ratings | 2 | 19 — better |
| Update frequency | Every 6 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod — better | iPad |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | HotPaw Productions | Harry Gohs |
Customer experience
Sing
Addictive Pro
In-app purchases
Sing
No in-app purchases
Addictive Pro
No in-app purchases









