Comparison

DXi FM synthesizer vs Tera Pro

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

Head to head
About

DXi FM synthesizer

Create unique sounds and music with this FM synthesizer app inspired by 80s hardware. Explore a variety of parameters to craft special tones and effects, and even record your creations. Includes a bonus 16-step loop sequencer for added musical exploration.

Highlights
  • 4 operator FM synthesis
  • 8 algorithms
  • Adjustable operator parameters
  • Master LPF and Delay effects
  • 16-step loop sequencer
  • Audio recording and export
  • MIDI keyboard support
Features
Read full description

DXi is a FM synthesizer application inspired by 80's most popular FM synthesizer. You will enjoy creating sounds as well as playing music with this application. FM synthesizer is still popular among many people by its unique tone. We carefully selected parameters from original synthesizer so you will be enjoy editing tone with them easily. You need to know some technique to tweak the tone, but you will be able to get DXi's special tone and effects while having some fun! Creating sound effects is another idea to enjoy DXi. We loaded 16 step loop sequencer as a bonus feature! If you remember the days of FM synthesizers, try creating the tone you remember from them. If you have no experience with any FM synthesizer, we are sure you will be enjoying the unique tone world! * 4 operators FM synthesizer * Anti-ailiased oscillator * 8 algorithms * Envelope, frequency (Ratio or Fixed), waveform (12 types) can be set each operators. * Feedback control on operator number 4. * 2 master effects (LPF with Resonance and Delay) * Unison mode * Spectrum and oscilloscope view * Import/Export function to save the tone you created. (URL schema text string format) * Audio recording function. And you can transport recorded audio file, .wav, onto Mac/PC via iTunes file sharing. * Clipboard audio sharing support. You can export recorded waveform to other application via clipboard. It's compatible with Intua's clipboard. * Supports external MIDI keyboards via Core MIDI USB adapters. * Supports background audio and virtual MIDI input port. * Supports Audiobus.

About

Tera Pro

Explore a vast array of sound synthesis methods, from analog emulations to modern digital techniques. Combine modules for unique sonic textures, enhanced by an intelligent interface and realtime visual feedback. Expand your sound palette with additional modules available through in-app purchases.

Highlights
  • Multiple synthesis methods (analog, FM, spectral, additive)
  • Physical modeling and wave shaping
  • Intelligent user interface with realtime scopes
  • Flexible module routing
  • 128-voice polyphony with vintage voice modeling
  • Seamless sound switching
  • Extensive preset library
Features
Read full description

Tera Pro brings together all major sound synthesis methods on one table. No matter if you want to recreate sounds from analogue legends or explore modern digital sounds with FM, Waveshaping or Wavetable synthesis. More can be added by In-App Purchases of new modules. Add some flavour of physical modelling and modules for additive synthesis. Combine them altogether for new sound experiences far beyond your wildest dreams. Tame this overwhelming amount of possibilities with Tera Pros intelligent user interface showing you only exactly what you need, paired with realtime oscilloscopes and level indicators helping you seeing what’s going on. Connect the modules with a flexible routing method without the visual cluttering of real wire cables needed in conventional modular synthesisers FAQ What does Tera Pro have that Tera Synth doesn't have ? 1) Additional Sound Modules - Spectrum oscillator ( borrowed from the heart of Addictive Synth ) - Wave shaper / folder opens the west coast synthesis - Vocal Morphing filter - KARPLUS (aka WaveGuide ) with new "Swarm" mode ( 3 detuned delays ) 2) Revised engine - Analog Polysynth Voice Modelling with characteristic subtle voice variations of timbre, pitch and temporal behaviour to get you "The" Analog Sound. - 128 vs 32 voices polyphony - Seamless Sound Switching: change presets during play without cutting off the sound. - 8 times unison for really heavy ambients - Envelope generators with Buchla style "end of cycle" trigger for generative music - Stack/Split Sounds - New effect section 3) Redesigned User Interface - Collapsible modules for clear view of modular structure - No more nasty popups for LFOs/Envelope generators - Realtime oscilloscopes added to selected modules 4) New Presets - About 1000 additional presets in there. Tera never sounded this good... Tera Pro Specifications - 128 voice Modular polyphonic Synthesiser - Mono/Dual/Split Voice Architecture - Modules for analog and FM synthesis - Modules for Spectral Synthesis and Additive Synthesis - Karplus Strong Physical Modelling and Wave Shaping - MIDI Polyphonic Expression (MPE) - Vintage voice modelling for organic warm sound character - 1800+ Factory presets included - PDF Manual included - Standalone, AUv3 and IAA compatible - Ableton Link - Bluetooth MIDI - ... Additional modules through In-App Purchases: - Classic Wavetable synthesis with Import - Classic 6-OP FM Synthesis fully compatible to DX7 sysex files. - BrainZ multiple synthesis module based on MI Plaits Eurorack module. - RingZ physical modelling module based on MI Rings Eurorack module. - CloudZ granular synthesis module based on MI Clouds Eurorack module.

Screenshots

DXi FM synthesizer4 screens
Tera Pro2 screens

Verdict

The call

The clearest difference is in-app purchases: DXi FM synthesizer at none against Tera Pro's 6. DXi FM synthesizer also leads on price ($1.99 vs $6.99) and review sentiment (88% vs 69%). Tera Pro's advantage is update cadence (every 5 days vs every 2 months) and rating (4.6 vs 4.3). On 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

CostPrice · In-app purchases · Ads · Monetization

DXi FM synthesizer costs $1.99 and Tera Pro $6.99 up front. Tera Pro sells 6 one-off in-app purchases. DXi FM synthesizer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Tera Pro holds the better App Store score, 4.6 against 4.3. That said, the two scores are not equally well evidenced: Tera Pro has 154 ratings behind it against 19, so its average is the more settled of the two. Written reviews complicate that: 88% of DXi FM synthesizer's written reviews are positive against 69% of Tera Pro's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

DXi FM synthesizer ships an update every 2 months, Tera Pro every 5 days. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

Scorecard8 real differences · 2 level
DXi FM synthesizer versus Tera Pro: the parameters behind the verdict, then further details
ParameterDXi FM synthesizerTera Pro
Price$1.99 — better$6.99
Rating4.3 (19 ratings)4.6 (154 ratings) — better
Positive reviews87.6% of reviews — better69.4% of reviews
Number of ratings19154 — better
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.4 — better12.0
Further details — not scored
Size5 MB306 MB
Age rating4+4+
DeveloperTakashi MizuhikiHarry Gohs

Customer experience

DXi FM synthesizer

All ratings19 ratings
Positive84.2%
Neutral5.3%
Negative10.5%
Written reviews153 reviews
Positive87.6%
Neutral3.3%
Negative9.2%

Tera Pro

All ratings155 ratings
Positive88.4%
Neutral5.8%
Negative5.8%
Written reviews72 reviews
Positive69.4%
Neutral18.1%
Negative12.5%

Bugs and requests

DXi FM synthesizer

Not enough reviews yet to summarise bugs or requests.

Tera Pro

Reported bugs

17 issues
  • App crashes on macOS and iOS
  • Piano keyboard not appearing
  • Wavetable module IAP producing no sound
  • In-app purchases disappearing or not activating
  • Presets causing white noise or feedback blasts
Show 12 more
  • UI glitches preventing parameter adjustment
  • Randomize function not working with wavetable oscillators
  • Arpeggiator losing sync in AUM
  • No sound output until patch toggling
  • LFO panel crashes when adjusting settings
  • Wavetable oscillator remaining silent
  • MIDI Learn settings not clearable
  • App not appearing in iPad Settings or Files app
  • Patches with feedback that require MIDI Panic
  • Inconsistent oscillator routing display
  • Parameter adjustment randomly not working
  • Sample rate unable to be changed

Requested features

15 requests
  • Undo/Redo functionality
  • MIDI Panic button (prominent placement)
  • Output limiter for safety
  • Standard black and white keyboard option
  • Favorites/bookmarking system for presets
Show 10 more
  • MIDI Learn reset/clear functionality
  • Key Hold button on main screen
  • Sampler module
  • Many-to-many modulation matrix
  • Fully dark theme on all UI screens
  • MIDI Program Change support
  • Solo and Mute buttons for oscillators
  • Partial number indicators for spectral oscillator
  • Better file system integration for backups
  • Improved velocity/aftertouch separation on keyboard

In-app purchases

None

DXi FM synthesizer

No in-app purchases

6 purchases

Tera Pro

One-time6
  • Library WaveShaper$0.99
  • Module Waves$5.99
  • FM 7 module$5.99
Show 3 more
  • Module RingZ$5.99
  • Module BrainZ$6.99
  • Module CloudZ$9.99

Questions

Is DXi FM synthesizer free?
DXi FM synthesizer costs $1.99, with no in-app purchases.
Is Tera Pro free?
Tera Pro costs $6.99, and also offers in-app purchases.
Which has better reviews, DXi FM synthesizer or Tera Pro?
Tera Pro is rated higher. DXi FM synthesizer averages 4.3 out of 5 from 19 ratings, while Tera Pro averages 4.6 from 154 ratings.
Do DXi FM synthesizer or Tera Pro have ads?
Neither DXi FM synthesizer nor Tera Pro shows ads.
Which is updated more often, DXi FM synthesizer or Tera Pro?
DXi FM synthesizer ships an update every 2 months, and Tera Pro every 5 days. Most recently, DXi FM synthesizer was updated on November 1, 2026 and Tera Pro on October 30, 2026.

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