# Modulin — Analog Modeling Mono Synth > Customizable analog modeling synthesizer with recording and sharing features. (iPhone/iPad app by Grant Emerson.) - Source: https://appshunter.io/ios/app/modulin/id1355652754 (this page in markdown: same URL + `.md`) - Developer: [Grant Emerson](https://appshunter.io/developer/1399718785) - Category: Music, Education - Price: Free with in-app purchases - Rating: 4.30/5 from 17 App Store ratings · 13 written reviews indexed - Age rating: 4+ - Requires: iOS 10.0 · 29 MB - Languages: American English, Chinese (Simplified, China), Chinese (Traditional, Taiwan) - Released: 2018-05-08 - Data updated: 2026-06-08 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/modulin/id1355652754/reviews.md ## What is Modulin? Modulin is the world's most customizable synthesizer. It allows for unique personal expression while providing a wide spectrum of visual feedback. The playful colored strings are visually appealing while providing the user with fluent modulation of Modulin's LFO. The LFO replicates the vibrato effect heard throughout an orchestra or choir. The LFO can be set to four different wave types: Sinuous, Triangle, Sawtooth, and Square. It also can be set to a wide variety of frequency ranges. Modulin's oscillator can also be set to these four waveforms, but its pitch is controlled by the strings and a tuning knob. A simple low-pass filter allows you to cut off the unnecessary frequencies. The glide rate knob on Modulin creates a fluent portamento effect and allows for some pretty cool instrument replications. A slider located in the middle of the effects view can be dragged to reveal different effects and extra sound makers. Modulin includes reverb, delay, and chorus. It also contains a separate white noise module. Modulin simulates paraphonicness by allowing for a second VCO multiplied to form a gap of up to 2 octaves. Below all the knobs, an ADSR control allows you to manipulate the attack, decay, sustain, and release of your sounds. Modulin truly is the complete package for channeling your inner-composer. It can even record and store your works of art. A record button allows you to lay down a beat and overwrite it with complex melodies. The tracks button allows you to manage your tracks as you add them. New to synthesis? No problem. Modulin has an explore section that takes you through every component in an analog synthesizer, describing what it does alongside a diagram of how signals flow through it. Master of all things musical? Modulin's got you covered again. You can change the root note, octave, and type of scale that Modulin uses. If you feel really confident, you could even turn off the note names in the settings and try to memorize where everything is. With over 40 presets and other preset packages to buy, you will never run out of new and unique sounds. Even if you do, you can create your own and save it for later or share it with friends by the swipe of your finger. Fat fingers? Don't worry. With Modulin’s design, you can plug in an external MIDI keyboard and play it however you like. You can even map certain knobs on Modulin to knobs on your keyboard. It's magic! The more you explore Modulin, the more fun it becomes. You can personalize it by adding your own custom color or amp up the expression through the pressure sensitivity setting. FEATURES ・Comes with over 40 presets (More available through Modulin’s store) ・Easily share presets and recordings with friends ・MIDI CC mapping ・Amazing digital synth sounds ・Multi track recordings ・Synthesis exploration area ・22 Scales (With the ability to add your own) ・Save custom presets ・Favoritize presets for quick and easy access ・Built-in metronome for playing in time ・Customizable color ・Toggling of note labels ・Fun flexible strings and an oscilloscope in the upper corner give a great level of feedback ・Effortless and intuitive design SUPPORTS ・All 64-bit iOS devices ・External MIDI controllers ・Bluetooth MIDI controller ・Audiobus and Inter-App Audio ・Share custom preset files over AirDrop, Mail, or other 3rd party applications ・3D Touch LFO Modulation ・Drag and Drop for Presets ## Key features - Customizable analog modeling synthesizer - LFO with four wave types - Low-pass filter and glide effect - Built-in reverb, delay, and chorus - Multi-track recording and playback - Synthesis exploration area - MIDI CC mapping ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Philharmodulin | Free | one-time | ## Recent user reviews (10 of 13) All indexed reviews: https://appshunter.io/ios/app/modulin/id1355652754/reviews.md ### 5/5 — Needs AUV 3 Support *2026-03-01* Add auv 3 or inner app audio would be dope otherwise this is a pretty cool instrument ### 5/5 — Octave shift *2020-12-23* I’ve just started using this, but thought I could respond to the two reviews complaining about not finding the octave shift. In the scale dropdown menu, the octave is the number in the middle, between the root note and scale type. Also, there is tutorial documentation in the “explore” button. ### 3/5 — Meh *2020-10-21* i could POSSIBLY give this a FIVE STAR, however...there is no user guide or anything i can find for help. Maybe i dont understand synths? Yet i have had a Model D since the earlly 70’s and have amassed a hardware collection modular/semi-mod/analogue/fm/keyboard/desktop/groovboxes etc. perhaps i am not technical? Yesi have been a software engineer since 88 I am going to delete this app mow as i cannot find how to switch octaves. Assume you can transpose somehow? Who knows but a user guide—even a high-level one because if am struggling think of all the folks who just moved on and mever bothered to tell you why. It takes all of a few hours to write ### 5/5 — Love it! *2020-08-06* Needs more love, this this rocks!!! ### 5/5 — What a cool app! *2020-05-20* This app sounds GREAT and I love the interface! I highly recommend it! ### 5/5 — Amazing and Original *2020-05-20* Super fun sound design playground and wonderfully original UI. It sounds great too! ### 3/5 — Surprised at its potential but needs development *2020-05-17* I was pleasantly surprised at this synth and love the non piano key approach to synthesis with the expression of the strings. Adjusting the glide and customization is great at coming up with some interesting sounds. Ableton Live Link would be a game changer. And there doesn’t seem to be any export function or even Apple Files integration for the tracks you record...seemingly basic functionality? More presets and add on packs are needed too. The UI could use a bit of polish but I think this is a great synth with potential! ### 5/5 — Intuitive, fun and with possibilities *2020-05-17* Just because an app is free doesn’t mean it’s any good, but in the case of Modulin it’s a winner! Lovely expressive intuitive controls, and plenty of options. Would very much like to buy AU3 and Midi Out as an IAP. Nic ### 2/5 — Just not useful or fun. *2019-09-23* It introduces audio artifacts. The UI is a plain in the arse. Presets are bland. The app has no punch. No dynamics and sounds more like a toy. 99 cents is a good price. The add on is a waste of 99 cents as they sound weak and amateurish. A waste of two dollars is not a terroble waste though I definitely was not paying the original asking price. Of no real use but to kids playing around. I five it 2-stars since it has a fair tutorial on the aspects of a synth. ### 5/5 — Awesome Little Synth *2018-08-14* As a beginner getting into synthesis, I found this app very helpful and entertaining. The explore section was an interesting way to discover analog synthesis. I also find the interface very intuitive and entertaining with the bendy strings. It sounds amazing and works great with my midi keyboard. ## Frequently asked questions about Modulin ### What is Modulin? Modulin is a highly customizable analog modeling synthesizer app that allows users to create and manipulate unique sounds. It offers a wide range of features for sound design, recording, and musical expression. ### What kind of sounds can I create with Modulin? Modulin allows for a wide spectrum of sounds through its customizable oscillator, LFO, and filter. You can replicate effects like vibrato and portamento, and add effects like reverb, delay, and chorus. ### Can I record my music with Modulin? Yes, Modulin includes a record button to lay down beats and melodies. It also features a tracks button to manage your recordings, supporting multi-track recordings. ### Is Modulin suitable for beginners? Yes, Modulin has an explore section that explains each component of an analog synthesizer with diagrams, making it accessible for beginners. It also comes with over 40 presets to get started. ### Can I connect a MIDI keyboard to Modulin? Absolutely. Modulin supports external MIDI keyboards, allowing you to play it as you like. You can even map certain knobs on Modulin to knobs on your MIDI keyboard. ### Does Modulin have ads? No, Modulin does not contain advertisements. It is a free app with optional in-app purchases for additional preset packages. ### What is the update frequency for Modulin? Modulin was last updated on June 15, 2018, with version 1.5. The initial release date was May 8, 2018. Further update frequency information is not available in the provided data. ### What devices is Modulin compatible with? Modulin is compatible with iPhones, iPads, and iPods. It is rated for ages 4 and up. ## Version history (last 5 releases) ### 1.5 — 2018-06-15 This app has been updated by Apple to display the Apple Watch app icon. Lots of updates have been made including both bug fixes and the addition of highly requested features. Knobs no longer go past the end and wrap around. Instead, they stop in place at the end of the loop. The bug involving the selection of Bluetooth midi connections has now been fixed. A slightly darkened border has been added to a few pop-ups in order to make them more visible. The preset selector now reloads its state to the correct grouping upon reopening and even highlights the preset you are currently using. The oscilloscope fades out after the sounds have diminished to silence instead of abruptly disappearing. The buttons along the top action bar are a little more spaced out for those of you previously having trouble hitting the correct button. Animations involving the knobs and the ADSR when selecting a new preset have been adjusted to replicate the physical turning of an actual knob. One of Modulin's new features involves the metronome. It automatically starts playing upon starting a new recording. Also, the effects panel automatically collapses when you start the recording so that you can get right to playing. Delete confirmation pop-ups have been included to prevent you from accidentally deleting one of your most important presets or recordings. The waveform knobs for both the VCO and the LFO have added snap to position capabilities. You can simply tap on one of the outer waveforms to jump to that exact waveform. The pitch wheel of any midi controller now controls pitch and the modulation wheel is automatically mapped to the cutoff frequency parameter. The most important update Modulin has is its new support for Drag and Drop on iPads. You can now simply drag and drop your custom presets from the preset selector into any supported file manager or messaging application.​ ### 1.4 — 2018-05-31 Modulin got a few UI tweaks and 10 more presets. Also, the name appearing in Inter-App Audio has been changed from "Sender" to "Modulin". ### 1.3 — 2018-05-28 Audiobus and Inter-App Audio support have​ been added. ### 1.2 — 2018-05-27 Modulin is now localized in Chinese! Any crackling sounds heard when turning either the reverb room size or delay timing knobs have been fixed and removed. The biggest improvement with the latest release of Modulin is a brand new built-in metronome. With the metronome, you can always be certain that your playing is in time across multiple tracks. Other UI improvements include a new custom scale creator and a favorite pre​sets section. ### 1.1 — 2018-05-12 - Fixed bug in some in-app purchases - Made string note values clearer ## Apps similar to Modulin | App | Rating | Price | Category | | --- | --- | --- | --- | | [Jam Synth](https://appshunter.io/ios/app/jam-synth/id732618765) | 5.0 (28) | Free | Music | | [Polywave - Wavetable Synth](https://appshunter.io/ios/app/polywave-wavetable-synth/id1579538271) | 4.7 (32) | Free | Music | | [Unique for iPad - Analog Synth](https://appshunter.io/ios/app/unique-for-ipad-analog-synth/id1213411818) | 3.4 (17) | Free | Music | ## More apps by Grant Emerson - [Aerial Lights](https://appshunter.io/ios/app/aerial-lights/id1375347601) - [Dompel](https://appshunter.io/ios/app/dompel/id1458154704) - [Plotony](https://appshunter.io/ios/app/plotony/id1502795362) All apps by Grant Emerson: https://appshunter.io/developer/1399718785 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-08.*