Comparison

Tachyon vs e

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

Head to head
About

Tachyon

This app allows users to blend any two sounds together to create unique musical expressions. Its intuitive interface lets you control pitch and tone independently, offering a mesmerizing visual experience as you play.

Highlights
  • Blend any two sounds
  • Independent pitch and tone control
  • Intuitive touch interface
  • Mesmerizing visual feedback
  • Custom sound library
Features
Read full description

Do you want to play an electric guitar and a piano at the same time? What about choosing the electrifying buzz of a drill and blending it into the soothing tone of a human voice? Jordan Rudess and Kevin Chartier’s Tachyon gives you all these options and more. From the makers of the award winning app, MorphWiz, comes a new creation that allows images and sound to become one as they magically blend under your fingertips. Each note you play is an individual expression, allowing independent control of pitch and tone far beyond that of traditional instruments. Most instruments only allow you to play one sound at a time, but with Tachyon, you can seamlessly blend between any two sounds as you slide your fingers up and down the screen. The visual experience of Tachyon is just as mesmerizing. As you move along the playing surface, a field of twinkling stars morphs into the shape of your selected instrument, allowing a direct correlation between sight and sound. As described by Jordan Rudess, “Tachyon is simple to use and at the same time offers a unique musical expressive power. The sonic core of the app is a custom crafted sound set from my personal library, encompassing sounds as familiar as those you would find in your home toolbox, and as exclusive as the ones I use on tour with Dream Theater." Whether you’re a seasoned musician looking for a next generation instrument to further express your creativity, or just a regular Joe browsing the app store looking for a fun and simple purchase that will delight the whole family, Tachyon is the app for you! “Check out Jordan Rudess’s new album with Steve Horelick entitled “interSonic”which features Wisdom Music Apps”

About

e

Create retro-style music with a sampling keyboard featuring tempo-based looping. Record, manipulate, and play back samples with various effects and flexible playback modes. Integrate with other audio apps and control parameters via MIDI.

Highlights
  • Retro sampling keyboard
  • Tempo-based looping
  • Reverb, bit crusher, resonant filter
  • Multiple loop and start/stop modes
  • MIDI control and Core MIDI support
  • AUv3, Audiobus, Inter App Audio integration
Features
Read full description

Elsa is a retro style sampling keyboard with tempo based looping. Record, save, load, reverse samples with a multi octave on screen keyboard or plug in your core midi device of choice, soft- or hardware. Elsa comes with three built in effects, a reverb, a resonant filter and a sample rate/bit crusher. Samples are looped in three different modes, one off, forward and/or forward-reverse. The start and end of playback also comes in three modes, one set of start and stop for all, one set per note and/or one set per octave, allowing for many different types of samples. Additionally at playback time, sample length can also be controlled by a set of sample dividers, 1-8. Elsa supports connections with AudioCopy, AudioBus, Inter App Audio and AUv3. Plus all audio parameters can be modulated by MIDI. +++ Sample keyboard +++ Tempo based looping +++ ADSR +++ Bit/sample crush +++ Reverb +++ Resonant filter: low, band or high pass +++ Record, trim, normalise, reverse, zoom +++ Chromatic and scale keyboard +++ 3 loop modes (one off, forward, forward-reverse) +++ 3 start/stop modes (one for all, one per note, one per octave) +++ Playback length dividers (1,2,3,4,5,6,7,8) +++ Arpeggiator +++ Presets: save/load settings +++ Audio connections: AUv3, Audiobus, Inter App Audio +++ Midi: Core Midi, Bluetooth Midi, AUv3 Midi +++ Ableton Link

Screenshots

Tachyon4 screens
e4 screens

Verdict

The call

The clearest difference is rating: e at 4.9 against Tachyon's 3.8. e also leads on update cadence (every 3 weeks vs every 14 months) and review sentiment (87% vs 78%). Tachyon's advantage is price ($1.99 vs $5.99) and iOS requirement (8.0 vs 11.0). On ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Tachyon costs $1.99 and e $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

e holds the better App Store score, 4.9 against 3.8. Both are backed by a comparable volume of ratings — 13 and 31 respectively. Written reviews point the same way: 78% of Tachyon's written reviews are positive against 87% of e's.

UpkeepUpdate frequency

Tachyon ships an update every 14 months, e every 3 weeks. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.

Scorecard5 real differences · 5 level
Tachyon versus e: the parameters behind the verdict, then further details
ParameterTachyone
Price$1.99 — better$5.99
Rating3.8 (13 ratings)4.9 (31 ratings) — better
Positive reviews77.7% of reviews87.1% of reviews — better
Number of ratings1331 — better
Update frequencyEvery 14 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better11.0
Further details — not scored
Size12 MB43 MB
Age rating4+4+
DeveloperWizdom Music LLCErik Sigth

Customer experience

Tachyon

All ratings13 ratings
Positive69.2%
Neutral7.7%
Negative23.1%
Written reviews103 reviews
Positive77.7%
Neutral10.7%
Negative11.7%

e

All ratings31 ratings
Positive96.8%
Neutral0.0%
Negative3.2%
Written reviews31 reviews
Positive87.1%
Neutral12.9%
Negative0.0%

Bugs and requests

Tachyon

Reported bugs

9 issues
  • IAA and Audiobus compatibility issues
  • Does not work with Audiobus
  • Does not launch with Audiobus
  • Inter-app audio and Audiobus connectivity missing
  • Broken on iPad 2 - iOS 7
Show 4 more
  • Not compatible with iOS 11
  • No sound output
  • App doesn't work anymore
  • App is broken

Requested features

18 requests
  • Audiobus and IAA support
  • MIDI support
  • MPE support
  • Ability to record
  • Update for notched iPhones
Show 13 more
  • Keyboard view
  • More sounds/instrument packs
  • Reverb settings
  • User sample import
  • Customizable scales
  • Automation/Arp
  • MIDI control
  • Ability to import sounds from other Wizdom apps
  • Moving filter in FX section
  • Hold button
  • Option to choose backgrounds
  • Lock menu buttons
  • More scales and custom scale creation

e

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Tachyon

No in-app purchases

None

e

No in-app purchases

Questions

Is Tachyon free?
Tachyon costs $1.99, with no in-app purchases.
Is e free?
e costs $5.99, with no in-app purchases.
Which has better reviews, Tachyon or e?
e is rated higher. Tachyon averages 3.8 out of 5 from 13 ratings, while e averages 4.9 from 31 ratings.
Do Tachyon or e have ads?
Neither Tachyon nor e shows ads.
Which is updated more often, Tachyon or e?
Tachyon ships an update every 14 months, and e every 3 weeks. Most recently, Tachyon was updated on October 2, 2026 and e on September 30, 2026.

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