SpaceTheremin vs BLEASS Groovebox
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpaceTheremin
Create unique soundscapes by touching and moving your screen to control pitch and cosmic delay effects. Explore various wave shapes and warp options to craft your sonic experience. This app offers a free version with limited multi-touch and a pro version for an ad-free, expanded experience.
- Touch and move screen for pitch control
- Cosmic delay sounds
- Multi-touch support (2 free, more in pro)
- Adjustable delay time and feedback
- Multiple wave shapes (Sine, Saw, Square, Triangle, Noise)
- Warp and Softness controls
Read full descriptionHide full description
Spacey Theremin Instruments app. Touch&move screen, will change pitch and Cosmic Delay Sounds!! Multi-touch free:2, pro:more than 2 Pro Version is No ad. Shake phone, put menu at menu->setting Delay On/Off Time Feedback Wave Sine Saw Square Triangle Noise Warp On/Off Softness Volume
BLEASS Groovebox
Create, perform, and compose music with this all-in-one beat studio. Features a multitrack sequencer, synthesizers, and drum machines for intuitive beatmaking and sound design. Optimized for both studio and live performance.
- Multitrack sequencer
- Monophonic & polyphonic synthesizers
- Drum machines
- Sample recording and editing
- Real-time performance controls
- MIDI and Ableton Link support
Read full descriptionHide full description
BLEASS Groovebox brings music production and performance to its very core: play, perform, compose beats, chords and melodies in a new yet intuitive way thanks to its multitrack sequencer, monophonic & polyphonic synthesizers and drum machines. PROFESSIONAL GRADE INSTRUMENT BLEASS Groovebox has been designed for both iPhone and iPad and offers great performance and stability thanks to its powerful realtime audio engine and fully customizable parameters: go deep in the shaping of electronic sounds without being limited by factory presets. WILD BASSES, BEATS AND SYNTHS Record, import and edit your own samples and make sick beats out of the 16 steps sequencer with customizable filters and grooves, as well as binary and ternary quantization. Customize endlessly your monophonic and polyphonic synthesizers by tweaking the effects, envelopes and LFOs ! BUILT FOR STUDIO AND LIVE PERFORMANCE Unique slider controls, long-press & multi-touch controls make this groovebox a perfect live tool: Record/Edit/Start/Stop/Copy/Paste your patterns as you feel like, build and arrange your songs on the fly, apply reverb or delay effects, and let the music live! COMPATIBLE WITH THE iOS MUSIC STANDARDS BLEASS groovebox supports Ableton Link and Inter-App Audio and also works in complete synergy with all of your studio soft- and hardware gear using MIDI IN/OUT and SYNC OUT features. Manage your project files, audio export, import your own samples thanks to the Apple iOS Files Integration. Load BLEASS groovebox in your favorite host or plug your iPhone or iPad in an external sound card to enjoy virtual and physical multi-track output routing. GENERAL FEATURES : > low-CPU and low-latency iOS-dedicated audio engine > up to 16 steps per bar > up to 8 bars per sequence > separate groove settings per track > binary and ternary time signatures and quantization > live and song modes > tap tempo > metronome > speed control for each sequence ( x 0.5 / x1 / x2 ) > multi-touch solo button for each track > start & stop sequences with single tap and double tap > 2 FX sends > 4 tracks sequencer > optimized workflow for a smooth live/studio experience > notes swapping : easily move a note to a different step > major and minor scales DRUM MACHINE > 6 user-customizable samples per track > sample length, attack, release and pitch settings > low pass and high pass filters > post and pre- drive and bitcrusher settings > velocity settings per step (with random velocity option) > sample import via iCloud or Files MONO SYNTHS > up to 9 virtual-analog synthesizers for each track > 2 oscillators + 1 noise > 1 amplifier envelope > 2 filters with 1 envelope > post and pre- drive and bitcrusher > 2 LFOs > presets loading > pitch envelope CHORDS > on the fly chords performance with scales > up to 4 virtual-analog synthesizers for each track > 2 oscillators + 1 noise > amplifier and pitch envelope > 2 filters with 1 envelope > strumming > bitcrusher > 2 LFOs > presets loading ADVANCED FEATURES > expression panels (pads or keyboard) with beat repeat > on the fly sequence recording with quantization > sample recording > iCloud synchronization > live audio export > Ableton Link & Inter-App Audio compatibility PRO FEATURES You can access all the BLEASS PRO FEATURES by purchasing the full unlock (pay once and own forever). As a PRO user, you gain access to all premium features, all samples and all presets packs, as well as upcoming new features and instruments added continuously: > Access to all samples packs (over 1000 samples). New sample packs added regularly! > Projects files management : load, save, import, export… > MIDI in/out > MIDI LEARN (control changes) > MIDI sync out > Presets saving > MIX panel > FXs parameters customization : reverb, delay, ping pong delay > External Audio Routing > Virtual Audio Routing (open separate BLEASS audio channels into any compatible host) Find tutorials and more about our plugins on www.bleass.com
Screenshots
Verdict
The clearest difference is rating: SpaceTheremin at 4.8 against BLEASS Groovebox's 4.2. SpaceTheremin also leads on review sentiment (100% vs 64%) and in-app purchases (none vs 1). BLEASS Groovebox's advantage is ratings volume (38 vs 4). On price, update cadence, 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
Both are free to download. BLEASS Groovebox sells 1 one-off in-app purchase. SpaceTheremin asks for nothing beyond the download.
SpaceTheremin holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: BLEASS Groovebox has 38 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of SpaceTheremin's written reviews are positive against 64% of BLEASS Groovebox's.
SpaceTheremin ships an update every 2 months, BLEASS Groovebox every 6 weeks. Both last shipped on October 24, 2026.
| Parameter | SpaceTheremin | BLEASS Groovebox |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (4 ratings) — better | 4.2 (38 ratings) |
| Positive reviews | 100.0% of reviews — better | 64.1% of reviews |
| Number of ratings | 4 | 38 — better |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 6.0 — better | 9.0 |
| Further details — not scored | ||
| Size | 6 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | YUKIO ONOZUKA | BLEASS |
Customer experience
SpaceTheremin
BLEASS Groovebox
In-app purchases
SpaceTheremin
No in-app purchases
BLEASS Groovebox
- Full Unlock$4.99









