iOptigan vs FontStack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iOptigan
Experience the unique lo-fi sound of a vintage optical organ on your iOS device. This app faithfully recreates the original instrument's sound and functionality, allowing you to play chord patterns and explore different musical styles. It includes a virtual spring reverb, metronome, and MIDI capabilities for expanded creative control.
- Authentic lo-fi optical organ sound
- Virtual spring reverb
- Optical metronome
- MIDI in/out and chord detection
- Sequencer with record/playback
- Audio and MIDI file sharing
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This is the Optigan for iOS. The Optigan, short for Optical Organ, was a chord organ from the early 1970’s. It is remembered today for its unique system of sound reproduction using optical discs. These LP-sized film discs were optically encoded with 57 concentric tracks, which contained loops of musical combos playing chord patterns in different styles. Each disc contained a specific style of music (Bossa Nova, Big Band etc) which the user could control by pressing the chord buttons. Changing the discs was as simple as putting a new record on your turntable. Think of it as the 1971 version of GarageBand. Despite this novel technology, the scratchy sound of the Optigan left a lot to be desired. The iOptigan we present here truthfully recreates that lo-fi sound. 25 of the original 40 discs are included, the remaining 15 can be purchased individually or all together in the Complete Pak. Specifications and Features: • Disc loading rigth-side-up or upside-down • Spring Reverb (virtual) • Optical Metronome • Audio Demo for each Disc • MIDI in/out • MIDI chord detection • MIDI File Import • Sequencer with Record and Playback • Sharing for songs as Audio and MIDI File • iTunes File Sharing • Inter-App Audio • Smart background audio • Help overlay • Headphone optimised stereo (optional) • Radio Mode for Chord Buttons or Keyboard • Comfortable speed control in semitones or BPM
FontStack
This app allows musicians to load and utilize classic SoundFont (.sf2) files within their digital audio workstation. It offers layering, key splitting, and instrument caching for creative sound design and quick access to a vast library of sounds.
- 4 SoundFont layers
- Keyboard splits
- SoundFont stacking
- Instrument caching
- Remote folder linking
- Reverb, Delay, Chorus effects
- Amp Envelope and Filter control
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FontStack is a 'fontastic' new AUv3 plugin for iOS which can be loaded into your favourite DAW allowing you to utilise all those wonderful and nostalgic SF2 SoundFonts you've collected over the years. The SoundFont standard was created back in the early 90s, and made famous by the SoundBlaster series of sound cards. With the introduction of the Amiga, it spawned a host of musical creation tools called Trackers, which allowed the Amiga to load these SoundFonts and create sophisticated musical scores of 4 or 8 tracks. These days we don't use this standard so much, but there is a wealth of free SF2 files available on the internet just waiting to be loaded into FontStack. A SoundFont comprises a file with an .sf2 file extension. This file contains a set of samples, instruments, and presets. FontStack enables you to load one or more SoundFonts into its 4 layers, and use them in lots of creative ways. You can stack layers to create a rich combination of multiple tones, or assign each layer its own key range on the keyboard to create virtual splits, or a mixture of the two. Each layer can also be assigned its own MIDI channel for true OMNI mode. One great feature of FontStack is its ability to cache all your SoundFonts and the instruments they contain. This allows quick searching for specific instrument types without the need to physically search through SoundFonts to find them. Another great feature is the ability to optionally link to a remote folder containing a global set of SoundFonts, so that they can be shared between apps. Both internal and external SoundFonts and their instruments will be cached and searching is just as easy as it is using internal SoundFonts. FontStack features: ○ 4 SoundFont Layers which can be stacked, layered or played on different channels. ○ 6 Scenes per Layer containing different SoundFont instruments and settings. ○ Keyboard Splits can be created spreading multiple SoundFonts over a single keyboard. ○ SoundFont Stacks can be created, stacking multiple SoundFonts to produce a bigger, thicker sound. ○ Disk Streaming allows you to stream a SoundFont directly from disk saving physical memory. ○ File Manager allowing local and remote file management. ○ Symbolic Link allows you to specify a remote/external folder from which to access your SoundFonts. ○ Instrument Search allows you to search the content of local and remote SoundFonts folders. ○ Drag and Drop your sound fonts directly into the SoundFont Manager. ○ Reverb, Delay & Chorus effects can be applied to each instrument layer. ○ Haas and Stereo Width can be used to simulate virtual STEREO on SoundFonts with MONO samples. ○ Allows direct control of the SoundFonts Amp Envelope and Filter settings.
Screenshots
Verdict
The clearest difference is price: iOptigan at $5.99 against FontStack's $14.99. iOptigan also leads on rating (4.8 vs 4.5) and review sentiment (92% vs 75%). FontStack's advantage is in-app purchases (none vs 16). 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
iOptigan costs $5.99 and FontStack $14.99 up front. iOptigan sells 16 one-off in-app purchases. FontStack asks for nothing beyond the download.
iOptigan holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: iOptigan has 114 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 92% of iOptigan's written reviews are positive against 75% of FontStack's.
| Parameter | iOptigan | FontStack |
|---|---|---|
| Price | $5.99 — better | $14.99 |
| Rating | 4.8 (114 ratings) — better | 4.5 (12 ratings) |
| Positive reviews | 92.2% of reviews — better | 75.0% of reviews |
| Number of ratings | 114 — better | 12 |
| Update frequency | — | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | #75 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 13 |
| Further details — not scored | ||
| Size | 179 MB | 308 MB |
| Age rating | +4 | 4+ |
| Developer | Stefan Stenzel | 4Pockets.com |
Customer experience
iOptigan
FontStack
Bugs and requests
iOptigan
Reported bugs
10 issues- Stuck/phantom keys on M1 iPad Pro
- E major plays D Diminished sample
- Bottom row of controls unresponsive
- Audio level clipping, especially when slowing playback
- Left-only headphone audio output
Show 5 moreShow fewer
- InterApp Audio broken in Garageband
- InterApp Audio buggy in n-Track Studio Pro
- App doesn't fill modern screen sizes
- Vamp loop section bug with 5th switch
- Gay 90's Waltz disc has incorrect flasher count
Requested features
19 requests- Update codebase with AudioKit Engine
- Allow app to run in background
- Add AudioUnit Extension support
- Include newly released sound packs
- Clarify chord identification methods
Show 14 moreShow fewer
- AUV3 version
- Audiobus compatibility
- Virtual MIDI support
- Ableton Link support
- MPE support
- Stacking discs for combined playback
- Add Orchestron sounds
- Add iChliton
- Add Talentmaker discs
- Update for larger screen compatibility
- Export WAV functionality
- Limit loudness of pops and scratches (equalizer?)
- Set release of keys
- MIDI program changes support
FontStack
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iOptigan
- Champagne Music$0.99
- Country Waltz$0.99
- Romantic Strings$0.99
Show 13 moreShow fewer
- Big Top Marching Band$0.99
- Polynesian Village$0.99
- Singing Rhythm$0.99
- Rollin’ Easy$0.99
- Movin'$0.99
- Cathedral Organ$0.99
- Vox Humana$0.99
- Country Sunshine$0.99
- Down Home$0.99
- Gospel Rock$0.99
- Guitar Boogie$0.99
- New Orleans Blues$0.99
- Complete Disc Pak$5.99
FontStack
No in-app purchases









