harpSampler vs Nulltrack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
harpSampler
Transform your device into a multi-touch harp by importing your own sounds or using the built-in sampler. Create unique musical instruments and special effects with adjustable octaves, scales, and chords.
- Import custom sounds for instrument generation
- Automatic 8-octave harp creation
- Multi-touch interface for live performance
- Adjustable scales and chords
- Real-time sound bending and start position control
- Record live performances
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"harpSampler" transforms your device into a professional multi-touch harp with sound sampler. Simply create your own sound sample (an "A" or "LA" note for musical instrument sound or any note for special sounds or special effects): - using the "REC" button of harpSampler (uses the internal microphone of the device to record the sound sample for the harp) - importing the sound sample that you have created with a wave editor for MAC or PC in your device through iTunes synchronization - using copy / paste for the audio file you have created using the technology "iTunes File Sharing" Once imported the sound sample, harpSampler tool will automatically create the complete "Harp" (with 8 octaves). At which point you can play your harp (with the sound created by you or using the default "HARP" sound included in the application bundle), or entertain your friends with a scale of special effects (harp style). The software is able to read all files / audio samples that are compatible with your portable device (.wav, .mp3, .m4a, .caf, etc ...), you can then create your sound (you only need one audio file) using standard wave editor for Mac or PC, add reverb, chorus, special effects (you can manipulate the sound as you wish), save it in the file format that you prefer and use harpSampler to automatically create the complete musical instrument, to be played like an harp. Using the "SAMPLE START POSITION" control you can choose the exact play start position of the sound sample ("wave cut"). Using the "REC" button you can record your live performance or record a new sound sample to be assigned to the musical instrument. Using the different scales (You can choose the scale You want from the "SCALE" menu), you do not need necessarily to be an expert musician to play some beautiful scales with your harp. Also, using the "chords" control (C, D, E, F, G, A, B) you can choose the chord for your harp or scale ("chords" work together with the "scale") . With harpSampler You can create the harp of your dreams or, in general, you can create any kind of musical instrument, or special effects generator and play it like an harp! Features: - Import any sound, and automatic generation of the musical instrument (8 octaves) - Storing infinite sounds using the archive of sound samples "Samples Archive" of harpSampler - Harp multi-touch for live music performances - Check for increase / decrease the eighth harp used in real time - "Bending" control to change the sound of the device in real time - "Sample Start Position" control: you can remove the initial part of a sample (eg. silence), specifying the play start time of the sample ("wave cut" feature) - "STOP" button to immediately stop the harp sound - Harp with multiple voices (up to 96 voices) - Default "HARP" sound provided with the app - Ability to "record" musical patterns during the live performance: start the recording (pressing the "REC" button), harpSampler will record an audio file of the music you are playing with the harp musical instrument (press a cable of the harp to play the recorded audio of Your live performance) - "CHORDS" control - Multiple scales selectable from the "SCALE" menu - Virtual keyboard, pressing the "V. KEYB.": disable the automatic scale and enable the virtual keyboard on the cables of the harp *** PROMOTIONAL MESSAGE: If You want to play the "Golden Gate Bridge" like a giant harp, using the sound samples of the Golden Gate Bridge itself, You can download the app "Play The Golden Gate Bridge". The sound samples of the "Golden Gate Bridge" provided with the "Play The Golden Gate Bridge" app were sampled by the "San Francisco Synthesizer Ensemble" company. Amazing sounds… Try it !!! ***
Nulltrack
This mobile digital audio workstation offers a unique, grid-based approach to music creation, inspired by classic trackers. It includes built-in synths, a sampler, extensive modulation options, and mixing tools.
- AUv3 plugin support
- Two built-in synthesizers
- Built-in sampler
- Extensive modulation options
- Mixing features with track faders
- Groove tables for swing/playback
- Pattern locking to scales
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Nulltrack! It's null when you start and a track when you finish! Nulltrack is a tracker and digital audio workstation app for your phone. A different way to make music inspired by LSDJ and the Dirtywave M8. Features: AUv3 plugin support - bring your external synths and effects into your track! Two built-in synthesizers -- A versatile two-oscillator Basic Synth and a feature-rich Bass Synth. A built-in sampler -- record your own samples with your phone's microphone, load your own, or use the built-in samples, set loop points, slice, reverse, etc. Modulation -- Modulate nearly anything with LFOs, AHD / ADSR / drum envelopes, velocity, randomness, and key tracking, filter, panning, and more. Mixing Features -- track faders with solo and mute, 13 built-in effects, sidechain compression Sends -- share effects between tracks Customize your swing/playback with groove tables! Lock your patterns to a built-in scale! ...and much more! New to trackers? They're a fast, grid-based way to write music. Try it out! No ads, no subscription, no in-app-purchases, and no account needed.
Screenshots
Verdict
The clearest difference is review sentiment: Nulltrack at 100% against harpSampler's 0%. Nulltrack also leads on update cadence (every 9 days vs every 37 months). harpSampler's advantage is price ($0.99 vs $7.99). 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
harpSampler costs $0.99 and Nulltrack $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
harpSampler ships an update every 37 months, Nulltrack every 9 days. The most recent releases landed on October 3, 2026 and October 18, 2026 respectively.
| Parameter | harpSampler | Nulltrack |
|---|---|---|
| Price | $0.99 — better | $7.99 |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 — better | — |
| Update frequency | Every 37 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 16.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Gianluca Natalini | DECTET LLC |
Customer experience
harpSampler
Nulltrack
In-app purchases
harpSampler
No in-app purchases
Nulltrack
No in-app purchases









