Comparison

Pro vs GCS Model 8 Mobile

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

Head to head
About

Pro

This app emulates the sound of an iconic analog poly synthesizer, offering a wide range of sonic possibilities from warm pads to soaring leads. It features advanced modeling, multiple filter styles, and extensive customization options for musicians.

Highlights
  • 10-voice polyphonic analog synth emulation
  • Authentic Poly-Mod and filter modeling
  • Dual filter styles: Classic Stepped and Modern Smooth
  • Extensive preset library with 600+ sounds
  • Microtonality panel with 150 curated scales
  • AUv3 plugin support for DAWs
  • Vintage-style step sequencer and arpeggiator
Features
Currently charting
Read full description

PRO-A5 (10-Voice Analog Synth) Experience the warm organic sound of the most iconic analog poly synth ever made. From Lush Brass, Silky Pads and Basses to Soaring Leads, this is the sound that defined Music Icons from the 80s to Radiohead. MAKE THE MUSIC YOU LOVE "SOUNDS AMAZING!" – Jim Sheridan, Live Band on "Name that Tune" TV Show on Fox Indie, Hip Hop, Pop, Funk, 80s, Synthwave, Rock, Lo-Fi, EDM, Ambient.. your sound awaits! "Sounds Authentic and Beautiful" – Synth Anatomy PURE SYNTH POWER! 2 FILTERS: Classic "REV 3" Inspired Stepped Filter Grit with Beautiful Stepping & Modern Smooth options Powerful Oscillator Sync, Poly Mod, Per-voice Analog Panning, Poly Unison stacks... "Pro-A5 synth is bonkers!!! Great job!!" – Kennard Garrett, Grammy-winning producer Plus a magic “Tune Rez” button that instantly tunes the filter self-oscillation so you can play the filter “I’m speechless. My most favorite analog synth on iPad ever. Unbelievable 70s / 80s feel” – Jay Zen, Producer "Fantastic! I've got at least 100 synths, yet Pro-A5 has impressed me. Great emulation and sounds unique. Genius!" – DMT Cymatics "This thing sounds totally insane. Makes me want to put wooden sides on my iPad" – Bri Kup "It has that warmth that other digital synths don't have" – Fieldtone Audio WATCH VIDEOS TO HEAR IT IN ACTION: audiokitpro.com/proa5 FEATURES • Desktop-VST Quality 10-Voice poly synth • NEW Sound Engine with advanced analog-modeling DSP • Authentic Poly-Mod with Filter ENV & OSC B as sources • Professionally modeled filter with self-oscillation • MICROTONALITY Panel + 150 Curated Scales (Microtonal, Indian, 12-tone, and more) • 600+ Exclusive Presets included (more to come) • 2 Filter styles: Classic Stepped "REV 3" Inspired and Modern Smooth • Magic “Tune Rez” button to instantly tune self-oscillation • 10 voices x 5 unison voices = almost a P-50?! You know the sound. If you need more details: • Raw, gritty Oscillator Sync • Accurate PWM engine with unique hardware-style Poly Mod behavior • Per-Voice Analog Panning • Single Note Polyphony for mono and poly sounds • 2x oversampling for more analog-style lows and highs • Original Hardware controls fit on one screen on iPad! • Aftertouch with 60+ possible destinations • 3 LFOs with 60+ destinations • LFO Shapes use analog resistor-mix behavior with soft-limiting • Dual assignable Touch Pads for real-time performance control • Classic Arpeggiator • Vintage-style Step Sequencer • NEW Cascading Reverb • FX: Rage Limiter, Analog Tape Delay, Chorus, Crush, and more • MIDI keyboard support + MIDI Learn • Universal app for iPhone and iPad • 432 Hz and selectable A-Tuning • Choose a key like Cm, Bb, Fm, and more. Select from Major, Minor, Blues, Pentatonic, and other scales you know and love! • Bonus Filter panel with slopes, envelope inversions, and extra goodies • No ads, subscriptions, or in-app purchases WORKS AS A PLUG-IN Use PRO-A5 as an AUv3 instrument in Logic for iPad, GarageBand, AUM, Cubasis, and more. WORKS BY ITSELF No other apps required. Play it standalone, connect a MIDI keyboard, map your controls with MIDI Learn, and start making music right away. EXPRESSIVE CONTROL PRO-A5 is built for performance. Use velocity, aftertouch, touch pads, LFOs, Poly Mod, MIDI Learn, and real-time FX control to make sounds move, breathe, and evolve. FREE UPGRADES MPE and Polyphonic Aftertouch are planned as a FREE future upgrade. PRO-A5 brings classic poly synth magic into the future. LEGAL NOTICES PRO-A5 is an original AudioKit instrument created to celebrate music-making and classic analog synthesis. It is not an official emulation, clone, or recreation of any specific hardware instrument. “REV 3” is used descriptively to refer to a revision-style sound character and does not imply affiliation with or endorsement by Sequential or any other third-party manufacturer. All trademarks are the property of their respective owners.

About

GCS Model 8 Mobile

This pocket-sized music production tool simulates analog tape recording with a realistic physics engine. It offers 8-track recording, built-in instruments, drum machines, and samplers for creative sound design on the go.

Highlights
  • 8-track recording with tape transport controls
  • Realistic analog tape physics simulation
  • Built-in synthesizers and drum machines
  • MPC-style pad sampler
  • Support for various tape formats
  • Bluetooth MIDI keyboard compatibility
Read full description

GCS Model 8 is a free, pocket-sized 8-track tape DAW for iPhone. It has a full blown physics engine which runs in the background and models classic reel-to-reel machines and various formats ranging from LoFi cassette to HiFi 1" tape. The engine is the exact same as the one used in the professional desktop recording version, but still runs very nicely on iPhone. GCS Model 8 for iPhone is completely free, with no in-app purchases, subscriptions, or ads. I really want people to have the engine as a fun tool for mobile settings without any sort of catch. Features: • 8-track recording with a real tape transport (play, record, rewind, fast-forward, punch, scrub) • Analog tape physics: adjustable wow, flutter, stickiness, head gap, hiss, and age • Built-in effects and tape techniques: reverse, SOS, punch, click track, loop • Built-in instruments: A-1 Mono Synth, A-10 Poly Synth, Glissandio (Ondes Martenot style slide synth), Stage Keyboard • Voxtone Drum Machine: synthesized analog drums with a dedicated step-sequencer (MATRIX) and live-trigger (PADS) view, plus two sample-based kits (808, Acetone) • 8-pad MPC-style Pad Sampler: load your own samples or mic them in directly, with pitch, trim, and gate controls • Reels: save, load, and share your sessions • Bluetooth MIDI keyboard support • Importing recordings to hit them to tape • Sound of Sound looping (Fripp style) • Formats: cassette, 1/4", 1/2" and 1" - along with various presets •Most of the features found on the desktop version Reels you create on iPhone move over to GCS Model 8 for iPad and GCS Model 8 for Mac/Windows, which add more tracks, more effects, and full export/mixdown for when you're ready to take a session further.

Screenshots

Pro4 screens
GCS Model 8 Mobile4 screens

Verdict

The call

The clearest difference is price: GCS Model 8 Mobile at Free against Pro's $7.99. GCS Model 8 Mobile also leads on iOS requirement (12.0 vs 14.4). Pro's advantage is chart position (#55 vs unranked). On rating, review sentiment, ratings volume and update cadence 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

GCS Model 8 Mobile is free to download; Pro costs $7.99 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 — 4.8 for Pro against 4.8 for GCS Model 8 Mobile. Both are backed by a comparable volume of ratings — 81 and 42 respectively. Written reviews are what separate them: 96% of Pro's written reviews are positive against 100% of GCS Model 8 Mobile's.

UpkeepUpdate frequency

Pro ships an update every 4 days, GCS Model 8 Mobile every 5 days. Both last shipped on October 24, 2026.

Scorecard4 real differences · 7 level
Pro versus GCS Model 8 Mobile: the parameters behind the verdict, then further details
ParameterProGCS Model 8 Mobile
Price$7.99Free — better
Rating4.8 (81 ratings) — better4.8 (42 ratings)
Positive reviews95.5% of reviews100.0% of reviews — better
Number of ratings81 — better42
Update frequencyEvery 4 days — betterEvery 5 days
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#55 — better—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS14.412.0 — better
Further details — not scored
Size64 MB135 MB
Age rating4+4+
DeveloperAudioKit Prowill patterson

Customer experience

Pro

All ratings78 ratings
Positive94.9%
Neutral0.0%
Negative5.1%
Written reviews67 reviews
Positive95.5%
Neutral0.0%
Negative4.5%

GCS Model 8 Mobile

All ratings25 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews15 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Pro

No in-app purchases

None

GCS Model 8 Mobile

No in-app purchases

Questions

Is Pro free?
Pro costs $7.99, with no in-app purchases.
Is GCS Model 8 Mobile free?
GCS Model 8 Mobile is free to download, with no in-app purchases.
Which has better reviews, Pro or GCS Model 8 Mobile?
Pro is rated higher. Pro averages 4.8 out of 5 from 81 ratings, while GCS Model 8 Mobile averages 4.8 from 42 ratings.
Do Pro or GCS Model 8 Mobile have ads?
Neither Pro nor GCS Model 8 Mobile shows ads.
Which is updated more often, Pro or GCS Model 8 Mobile?
Pro ships an update every 4 days, and GCS Model 8 Mobile every 5 days. Most recently, Pro was updated on October 24, 2026 and GCS Model 8 Mobile on October 24, 2026.

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