Comparison

AudioKit FM Player 2 vs Locus

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

Head to head
About

AudioKit FM Player 2

This app offers a classic 80s FM synth experience with a vast library of sounds, effects, and sequencing capabilities. It's designed for musicians and producers to explore award-winning tones and create music on their iPad.

Highlights
  • Classic 80s FM Synth, EP, and FM Tine sounds
  • Multi-sampled recordings of famous classic presets
  • Stand-alone, IAA & Audiobus, AUv3 support
  • Vintage Arp & 16-Step Sequencer
  • 200+ presets and 150+ multi-sampled PCMs
  • Vintage Stereo Phaser, Chorus, Flanger, Amp Simulator
  • MIDI in for keyboard control
Read full description

Beautiful iPad instrument featuring classic famous 80s FM Synth, EP, and FM Tine sounds. Featured by Apple. "BEST APPS OF 2017" - Electronic Musician Magazine "BEST iOS APPS – 2017" - Audio News Room (ANR) FM Player 2 is the secret weapon for major musicians and grammy-winning producers. Now, you can have all these award-winning sounds on your iPad. AWESOME FEATURES: - Faithful multi-sampled recordings of famous classic presets from original retro 80s FM Synthesizers - Stand-alone iPad Synth, plus IAA & Audiobus - Basic AUv3 Plugin support. We're working on upgrading Audio Unit support. - Vintage Arp & 16-Step Sequencer - 200+ presets and 150+ multi-sampled PCMs included! - NEW Vintage Stereo Phaser Effect - 1+ Gigabyte of sounds, compressed to under 300mb! - Dual layers per voice. KeyboardSplits. Morph between sounds - Full ADSR Envelopes for each Layer - 3 LFOs. Fun Routings. LFOs can modify other LFOs. - NEW FX: Vintage Chorus, Flanger, Amp Simulator, and more - Beautiful Reverb, Auto Pan, Bit Crush, Stereo Fatten, and more! - MIDI in (Play with a MIDI Keyboard) - Analog Tape Style Ping-Pong Delay - Mono glide & legato modes - Dual Independent Filters per layer - Tempo-sync controls & Ableton Link - GREAT for playing Live with a Keyboard: MIDI Mod Wheel, Pitch Wheel, Program Change, Velocity sensitive sounds, and Sustain Pedal support already added - All Knobs have MIDI Learn! NOTE: This app is amazing as a live instrument controlled with a MIDI Keyboard. The main Electric Piano and Full Tines sounds have 20+ layers for maximum expressiveness. Subscribe to access to premium app features; subscription details are the following: - Length: weekly or yearly - Free trial: only on selected subscriptions - Your payment will be charged to your iTunes Account as soon as you confirm your purchase - You can manage your subscriptions and turn off auto-renewal from your Account Settings after the purchase - Your subscription will renew automatically, unless you turn off auto-renew at least 24 hours before the end of the current period - The cost of renewal will be charged to your account in the 24 hours prior to the end of the current period - When canceling a subscription, your subscription will stay active until the end of the period. Auto-renewal will be disabled, but the current subscription will not be refunded - Any unused portion of a free trial period, if offered, will be forfeited when purchasing a subscription Terms & Conditions: [https://magic-cake-e95.notion.site/AudioKit-FM-Player-2-DX-Synth-Terms-Conditions-14bcf6557a0880dba5eceab2ca1068bb?pvs=4](https://www.notion.so/AudioKit-FM-Player-2-DX-Synth-Terms-Conditions-14bcf6557a0880dba5eceab2ca1068bb?pvs=21) Privacy Policy: [https://magic-cake-e95.notion.site/AudioKit-FM-Player-2-DX-Synth-Privacy-Policy-14bcf6557a0880be8468ecef6beb62c8?pvs=4](https://www.notion.so/AudioKit-FM-Player-2-DX-Synth-Privacy-Policy-14bcf6557a0880be8468ecef6beb62c8?pvs=21) Note: App may not work on older iPad 4 devices. - This app has no official affiliation with AudioKit Pro, LLC. It was built using the free AudioKit source code. - This app has no official affiliation with Yamaha or the DX7 or DX7II. FM Player is an open-source project to bring the joy of music making to the world. We appreciate Yamaha's beautiful instruments. - * This app has no official endorsement with any artist or producer named in the description (including Herbie Hancock, Jay-Z, Drake, etc). We are humbled they have used our apps. They have received no payment or otherwise compensation for using our apps. :)

About

Locus

This app generates evolving melodic MIDI sequences for electronic music production. It offers thirteen generative archetypes and extensive editing capabilities, allowing users to create unique musical ideas and arrange them into full compositions. It functions as a standalone application or an AUv3 MIDI effect within compatible hosts.

Highlights
  • Generative MIDI sequencing
  • 13 unique generative archetypes
  • Seed-derived, reproducible patterns
  • Evolve, Feel, and Edit controls
  • Per-note slides with 303-style legato
  • 25 scales and snap-to-scale pitch
  • Standalone and AUv3 MIDI effect
Features
Read full description

Locus is a generative MIDI sequencer that creates evolving melodic motifs and sends them to your favorite synths. Designed for techno, ambient, IDM, and experimental electronic music, it turns a single seed into fresh musical ideas across thirteen generative archetypes, from acid-style grooves and cascading arpeggios to sparse fractals and interlocking pulses. Use Locus as a standalone app or as an AUv3 MIDI effect inside hosts like AUM, Logic, Cubasis, and Drambo. Every generated pattern plays in sync with your host and routes over MIDI to any instrument you choose. GENERATION Press CREATE and Locus composes a new motif from the current archetype, rooted in your chosen key and scale. Each archetype has its own rhythmic and melodic character: Groove, Cascade, Arc, Wander, Call & Answer, Chaos, Pulse, Even Pulse, Sparse Fractal, Interlock, Cluster, Puncture, and Thump. Generation is seed-derived, so the same settings always reproduce the same pattern. EVOLVE Push EVOLVE to generate controlled variations of the current motif. Keep what works, mutate what doesn't. Rhythm and pitch shift in musically coherent ways without losing the pattern's identity. FEEL Shape the musical foundation with Root, Scale, Timing, Steps, Octave range, Swing, Dynamics, and Density. 25 scales keep everything in key. Raise density to fill the grid or thin it out for space. EDIT & SLIDE Engage Pattern Lock to edit the authored pattern directly: rotate, move, and transpose notes, or undo and redo. The SLIDE knob adds per-note slides with 303-style legato, gliding between pitches for classic acid phrasing. Slides even carry across density-thinned notes. SCENES Capture complete musical setups in sixteen scene slots and chain them into full arrangements. Each scene remembers its pattern, archetype, feel settings, and slide amount. STANDALONE & AUV3 Use Locus as a standalone app or as an AUv3 MIDI effect. It runs in AUv3 hosts such as AUM, Logic, Cubasis, and Drambo, following host transport and clock. KEY FEATURES • Generative MIDI sequencer for melodic ideas • 13 archetypes: Groove, Cascade, Arc, Wander, Call & Answer, Chaos, Pulse, Even Pulse, Sparse Fractal, Interlock, Cluster, Puncture, Thump • Seed-derived generation, reproducible from your settings • Evolve, Feel, and Edit scopes for total musical control • Per-note slides with 303-style legato • 25 scales with snap-to-scale pitch • Swing, dynamics, and density shaping • Pattern Lock with rotate, move, transpose, undo/redo • 16 scenes with chain editor for full arrangements • AUv3 MIDI effect + standalone app • Host sync and MIDI routing to any instrument MANUAL & TUTORIALS • See the "Help" page in the app for the full manual and tutorials • Alternatively, visit https://terrarum.net/locus.html to read them online

Screenshots

Locus4 screens

Verdict

The call

The clearest difference is price: AudioKit FM Player 2 at Free against Locus's $3.99. AudioKit FM Player 2 also leads on ratings volume (3.4K vs 2) and iOS requirement (13.0 vs 17.6). Locus's advantage is in-app purchases (none vs 8) and ads (none vs shown). On rating 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

AudioKit FM Player 2 is free to download; Locus costs $3.99 up front. AudioKit FM Player 2 sells 8 in-app purchases, starting at $2.99 per 7 days. Locus asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Locus holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: AudioKit FM Player 2 has 3.4K ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

AudioKit FM Player 2 ships an update monthly, Locus every 2 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard7 real differences · 3 level
AudioKit FM Player 2 versus Locus: the parameters behind the verdict, then further details
ParameterAudioKit FM Player 2Locus
PriceFree — better$3.99
Rating4.8 (3.4K ratings)5.0 (2 ratings) — better
Positive reviews79.1% of reviews—
Number of ratings3.4K — better2
Update frequencyMonthlyEvery 2 weeks — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPadiPhone, iPad — better
Requires iOS13.0 — better17.6
Further details — not scored
Size357 MB15 MB
Age rating4+4+
DeveloperAudiobus Pty LtdJoe Topjian

Customer experience

AudioKit FM Player 2

All ratings3,265 ratings
Positive97.3%
Neutral1.1%
Negative1.6%
Written reviews487 reviews
Positive79.1%
Neutral7.0%
Negative14.0%

Locus

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

AudioKit FM Player 2

Reported bugs

3 issues
  • Crashes when switching presets
  • Midi playback not working consistently
  • Preset loading issues in some DAWs

Requested features

4 requests
  • Arpeggiator/sequencer functionality
  • Ability to save and load custom presets
  • Improved MIDI integration and mapping
  • Expanded sound library and more DX-style presets

Locus

Not enough reviews yet to summarise bugs or requests.

In-app purchases

8 purchases

AudioKit FM Player 2

Subscriptions8
  • Weekly premium$2.997 Days
  • Weekly premium7 Days trial$2.997 Days
  • Weekly premium7 Days trial$4.997 Days
Show 5 more
  • Weekly premium$4.997 Days
  • Yearly premium$9.991 Year
  • Weekly premium7 Days trial$9.991 Year
  • Yearly premium7 Days trial$29.991 Year
  • Yearly premium$29.991 Year
None

Locus

No in-app purchases

Questions

Is AudioKit FM Player 2 free?
AudioKit FM Player 2 is free to download, with in-app purchases available.
Is Locus free?
Locus costs $3.99, with no in-app purchases.
Which has better reviews, AudioKit FM Player 2 or Locus?
Locus is rated higher. AudioKit FM Player 2 averages 4.8 out of 5 from 3.4K ratings, while Locus averages 5.0 from 2 ratings.
Do AudioKit FM Player 2 or Locus have ads?
AudioKit FM Player 2 shows ads; Locus does not.
Which is updated more often, AudioKit FM Player 2 or Locus?
AudioKit FM Player 2 ships an update monthly, and Locus every 2 weeks. Most recently, AudioKit FM Player 2 was updated on November 6, 2026 and Locus on October 31, 2026.

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