Comparison

ThumbJam vs SpaceFields

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

ThumbJam

This app provides a powerful musical performance experience with over 40 high-quality instrument sounds and hundreds of scales. It allows users of all skill levels to play in any style, offering expressive controls and loop-building capabilities.

Highlights
  • Over 40 high-quality multi-sampled instruments
  • Hundreds of included scales for any style
  • Expressive controls using tilt and shake
  • Loop building and audio export
  • Extensive MIDI and Audiobus support
  • Powerful arpeggiator feature
Features
Currently charting
Read full description

ThumbJam is a powerful musical performance experience. You get over 40 high-quality real instruments multi-sampled exclusively for this app. Hundreds of included scales allow you to effortlessly play in any style from rock to classical, whether you are a musical novice or a seasoned professional. ---====--- Jordan Rudess, the world-renowned keyboardist for Dream Theater says: "ThumbJam stands at the very top of the overcrowded music app world. The sounds included absolutely rival those found in pro instruments and making music on the app is a total joy. The only problem I have with this app is that I did not make it myself! Luckily, I'm able to work with the developer and offer a few good feature ideas as well as some choice sounds from my personal collection!" ---======---- Even if you've only played air guitar, ThumbJam lets you sound like a pro. Pick an instrument and jam -- with all the scales to choose from you'll never hit a wrong note. The high quality instrument samples will make you sound like you just skipped years of music lessons. For the performing musician, this app is awesome for soloing on an instrument you didn't bring along. Play in any key, any style -- go from a string ensemble to a wailing guitar. ThumbJam was developed and tested by musicians to feel and sound like a real instrument. You'll be surprised at how expressive it can be, make sure to check out the videos and audio at thumbjam.com. ThumbJam makes use of tilt and shake to add vibrato, tremolo, note bends, and volume swells for more realistic and expressive results. It supports up to five (eleven on iPad) simultaneous touches and up to 32 voice polyphony, for each of up to 8 loaded instruments! Delay and stereo reverb add depth to the sound, and a resonant lowpass filter gives you more tone shaping power. Put on your headphones or plug in to your home stereo to experience some of the highest quality instruments in the App Store, even after all these years! Build your own loops from the ground up or import your favorites and jam from there. Layer as many loops as you want, with different instruments for each. Export your loops as audio files via WiFi. Copy and paste audio from other apps using AudioCopy/Paste as well the general pasteboard, via email, AudioShare, iTunes Document Sharing, Files, or open directly in another application. Supports Audiobus and InterApp Audio for streaming sound to/from other apps in real-time, including state save/restore with Audiobus 3. Extensive MIDI input and output support over WiFi or Bluetooth, with any CoreMidi compatible device, or other apps on the same iOS device with virtual MIDI. Now also supports Ableton Link for tight sync between apps on the same network. Supports MPE input and output (and did so before it was even a thing)! New powerful arpeggiator feature lets you play patterns with perfect time sync, from the screen or via MIDI control. The app includes a huge variety of scales, from western to eastern. Save your favorites for quick access, or create your own in-app. You can even import new scales in the Scala format for complete flexibility. You can also record your own multi-sampled instruments using a built-in or attached microphone, or from file import. Included instruments: + Cello, Violin, Viola + Upright Bass (plucked and bowed) + Several drumkits + Darabukka + Djembe + Electric Guitar + Electric Bass + Trumpet + Trombone + Tenor Sax + Flute + Low Whistle + Acoustic Guitar + Hammered Dulcimer + Mandolin + Cittern + Grand Piano + Drawbar Organ (2 types) + Rhodes + Pipe Organ + Synth Strings + Synth Choir + Theremin + Sawtooth Waveform + Sine Waveform + Triangle Waveform And from Jordan Rudess: + JR Zendrix + JR Smooth Steel Many more for immediate FREE download in the app including several drumkits, Mellotron, basses, banjo, tabla, ukelele, guitars and more! Go to the Sound menu under Download Samples....

About

SpaceFields

Create evolving rhythmic soundscapes from any audio source. This app uses a loop-based system with dual loops, pitch shifting, and effects to generate ambient textures and rhythmic structures. Experiment with complex sound design using intuitive controls and randomization.

Highlights
  • Loop-based sound mangling
  • Dual loop recorder
  • Pitch shifting and effects
  • Convolution reverb with deep spaces
  • Rhythmic structure generation
  • Automation generators with randomization
  • Live and sample processing modes
Features
Read full description

Loop-based mangler effect to create slowly changing rhythmic sound structures in deep reverb space from any external sources or samples. Great for experimenting and designing ambient and noise backgrounds with rhythmic elements. The principle of the application is quite simple. It is based on a loop recorder with two loops. When one loop is recorded, the second is played back. When the loop recording stops, there is a smooth transition between them. Three separate outputs can playback the recorded loop with different pitches (speeds), each with its own effects and two automation generators. The mix of these outputs is fed to the convolution reverb. The reverb is packed with a set of long and deep sound spaces that create a blurry and ambient sound. But the main feature of this application is its well designed parameters that make it easy to experiment with a huge number of sound options using any source material from live instruments to synthesized sound. With just two parameters you can add complex rhythmic structures based on Euclidean rhythms, and easy-to-use automation generators with a randomize option to add variations to the sound, allowing you to modify parameters like an LFO or based on a given rhythm. The convolution reverb has advanced options with which you can change and extend the original reverb spaces. Even using the randomization options, in almost every case, you will get interesting and various soundscapes and textures. With these options it is very easy to create the basis for new unique presets. It only takes a little tweaking of some parameters to get impressive results. The loop recorder can be started and stopped manually or by input signal, can use fixed length or overwrite the loop while recording, and has the option for crossfade between the end and the beginning of the loop. All this makes it convenient for live use as well as when processing recorded material. As an extended option, you can use a special mode in which the application works as a direct effect, without the loop recorder. The special mode sampler is designed for quickly load samples and easy control of the application when used it live. This panel contains the input and output controls, essential controls of the loop recorder, and a large area with a recording counter, which is also used to start/stop the recorder. You can assign up to nine samples for fast loading into the loop, as well as save a recorded loop as a sample and to an external file. SpaceFields is a universal application for iOS and macOS. It can work on iPhone and iPad as well as Mac / MacBook with M1 chip (and later). SpaceFields works on iPhone and iPad standalone, as an Audio Unit or Inter-App Audio module, with supports Audiobus host app. On MacOS, SpaceFields can works both as a standalone application and as an Audio unit (AUv3) with DAWs and other hosts that support AUv3 plugins. All application features are available on iOS and macOS, including MIDI support (with a MIDI learn option), audio unit parameters and importing samples from any directory on device. SpaceFields has a built-in detailed description of all parameters also available as PDF file on the application site. Demos and previews: https://www.youtube.com/watch?v=cL1Dis3u0AQ https://www.youtube.com/watch?v=TpkWkc5I0uE https://www.youtube.com/watch?v=74LyfDM2dQM You can find more information on SpaceFields and other creative audio apps at: https://motion-soundscape.blogspot.com

Screenshots

ThumbJam4 screens
SpaceFields4 screens

Verdict

The call

The clearest difference is price: ThumbJam at $6.99 against SpaceFields's $10.99. ThumbJam also leads on chart position (#132 vs unranked) and ratings volume (218 vs 47). SpaceFields's advantage is update cadence (every 2 months vs every 4 months). On rating, review sentiment, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

ThumbJam costs $6.99 and SpaceFields $10.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for ThumbJam against 4.7 for SpaceFields. Both are backed by a comparable volume of ratings — 218 and 47 respectively. Written reviews are what separate them: 85% of ThumbJam's written reviews are positive against 90% of SpaceFields's.

UpkeepUpdate frequency

ThumbJam ships an update every 4 months, SpaceFields every 2 months. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

Scorecard5 real differences · 6 level
ThumbJam versus SpaceFields: the parameters behind the verdict, then further details
ParameterThumbJamSpaceFields
Price$6.99 — better$10.99
Rating4.7 (218 ratings)4.7 (47 ratings)
Positive reviews84.6% of reviews90.5% of reviews — better
Number of ratings218 — better47
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
Best chart rank#132 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better13.4
Further details — not scored
Size215 MB132 MB
Age rating4+4+
DeveloperSonosaurus LLCIgor Vasiliev

Customer experience

ThumbJam

All ratings218 ratings
Positive90.4%
Neutral3.2%
Negative6.4%
Written reviews298 reviews
Positive84.6%
Neutral4.4%
Negative11.1%

SpaceFields

All ratings47 ratings
Positive91.5%
Neutral2.1%
Negative6.4%
Written reviews21 reviews
Positive90.5%
Neutral0.0%
Negative9.5%

Bugs and requests

ThumbJam

Reported bugs

3 issues
  • Instrument muting when switching apps or opening help
  • Inconsistent behavior and freezing after recent updates
  • Inability to load/save recorded sets or mixes

Requested features

6 requests
  • Add chord mode for easier chord playing
  • Improve loop recording and syncing capabilities
  • Implement quantization options for tighter timing
  • Expand instrument library with more diverse sounds
  • Add support for Audio Unit (AUv3) to integrate with DAWs
Show 1 more
  • Improve interface for adjusting octave/span across multiple instruments

SpaceFields

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

ThumbJam

No in-app purchases

None

SpaceFields

No in-app purchases

Questions

Is ThumbJam free?
ThumbJam costs $6.99, with no in-app purchases.
Is SpaceFields free?
SpaceFields costs $10.99, with no in-app purchases.
Which has better reviews, ThumbJam or SpaceFields?
ThumbJam and SpaceFields are both rated 4.7 out of 5 on the App Store, from 218 and 47 ratings respectively.
Do ThumbJam or SpaceFields have ads?
Neither ThumbJam nor SpaceFields shows ads.
Which is updated more often, ThumbJam or SpaceFields?
ThumbJam ships an update every 4 months, and SpaceFields every 2 months. Most recently, ThumbJam was updated on October 14, 2026 and SpaceFields on October 9, 2026.

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