Contour Downloads & RevenueContour — Ambient Morph Synth · App Store
Not in any tracked top chart right now.
Updated 11 Nov 2026 · rankings refresh through the day
DeveloperChih Han Lin
CategoryMusic
PriceFree
Released
Rating★ 4.0 (2)
Version1.0.4
Age rating4+
First seen by us
12 Oct 2026
12 Oct 2026Contour — Ambient Morph Synth update history & changes
Last change · 3 events since 18 Aug 2026Full timeline ↓Full timeline · 3 events
- 🆕Contour — Ambient Morph Synth first spotted by AppInsiderUnited States (found via developer)
- 📦Contour — Ambient Morph Synth version 1.0.4Exports from your DAW come out clean, and a MIDI keyboard plugged into the app finally plays it.
In the app
• A MIDI keyboard plays Contour. It never did: every message from an external controller was misread and dropped.
• Recordings play back at the speed and pitch you played them. On most iPhones they came out about three times slower and more than an octave and a half low.
• Sound comes back after a phone call, Siri, an alarm, or plugging in headphones. Before, the instrument stayed silent until you quit and reopened it.
• Stopping a recording no longer freezes the screen, and a recording that fails says so instead of doing nothing.
• One damaged sheet file no longer hides every sheet you have baked.
• Previewing and baking a sheet takes about half the time.
• With nothing playing, nothing recording and no keyboard connected, Contour no longer keeps running in the background. With a keyboard connected it plays on as before.
• VoiceOver can buy Pro, restore a purchase, and close the Pro and Settings panels. None of their buttons could be reached before.
With a keyboard, in the app and in a host
• Playing legato no longer cuts off the note you are holding when you lift the one before it.
• Pitch bend returns to the note when the wheel comes back. In the app it used to climb further with every message.
• In the plug-in, the sustain pedal, pitch bend and aftertouch all work, and stopping the transport releases every held note.
In a host
• Exports and bounces are clean. A host renders an export much faster than real time and Contour could not keep up, so most of the file was silence broken by fragments of sound. It now renders at whatever speed the host asks, and the same project exports the same way every time.
• Exports keep the release and the reverb tail instead of cutting them off where the region ends.
• Notes land where the host places them. They were moved to the start of each buffer — up to 85 ms early in a large one.
• Automation ramps sweep instead of jumping straight to the end.
• Latency stays the same from the moment the plug-in loads, and long sessions over Bluetooth or USB audio no longer start to drop out.
• Deleting a sheet you baked no longer silences the one that is playing, and a saved project always reopens on the sheet it was saved with.
Thank you to the player who wrote in about exports.… more - 🆕Contour — Ambient Morph Synth released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
4.0 ★
2 ratings
Measured
Contour — Ambient Morph Synth on the App Store
App details
App ID
6798038727
Publisher
Chih Han Lin
On the store since
Aug 2026
Under a year
Minimum OS
iOS 16.0+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
114 MB
Also listed in
Entertainment
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Not charting right now. | ||
Ratings
App Store, worldwide.
Rating
4.0 ★
2 ratings
Measured
Ratings
2
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Lifetime rating
4.0★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
20/100
faster than 0% of Music apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
About Contour — Ambient Morph Synth
Contour is an instrument you play by walking.
Four neural decoders sit at the corners of a square. Your finger somewhere in
the middle is a blend of all four, and the square is drawn as a survey sheet.
The contour lines are not decoration. They come from what those four decoders
actually produce, laid out so that equal distances on screen are equal
perceptual distances in sound. Cross a line and the sound has changed by a
measured amount.
THE SHEETS
Eleven of them, each a different set of four corners, each chosen by measuring
the whole library rather than by ear. They are grouped by what the measurement
found:
BRIGHT — HEHUAN, the brightest, where all four corners hold their own.
CONTRAST — BEIYIDUAN, the widest corner spread at 8.2 times.
BREATH — NENGGAO, the breathiest.
DEPTH — MABO, the deepest at 53 dB.
RANGE — YUSHAN, the widest at 66 semitones; JIAMING, the most focused at 17.
They are named after Taiwan's high mountain traverses.
PLAYING IT
Touch the sheet to sound it. The ribbon underneath sets pitch, or send MIDI and
play it from a keyboard. Press harder and the note opens up — the contact patch
of your finger is the dynamic. Hold on empty ground to drop a mark you can come
back to.
The readout above the ribbon tells you where you are while you are there:
brightness, noise, the grid reference, the frequency.
IN A HOST
Contour is also an AUv3 plug-in. It runs in AUM, GarageBand, Cubasis, Logic for
iPad and anything else that hosts Audio Units, with the position automatable as
two parameters and the sheet recallable with your session. The plug-in draws
the same map the app does, laid out for the window a host gives it.
WHAT IS FREE
Three sheets — BEIYIDUAN, NENGGAO and YUSHAN — with the whole instrument: the
map, the ribbon, MIDI, reverb, marks, and the plug-in. No time limit and no
account.
CONTOUR PRO
A single purchase, once, unlocks:
• All eleven sheets
• Recording, straight to a file
• The envelope panel — attack, decay, sustain, release
• Composing sheets of your own from the library, 4,845 combinations of four
corners, with the map baked for the pitches they share
Requires iOS 16 or later. iPhone and iPad.
Four neural decoders sit at the corners of a square. Your finger somewhere in
the middle is a blend of all four, and the square is drawn as a survey sheet.
The contour lines are not decoration. They come from what those four decoders
actually produce, laid out so that equal distances on screen are equal
perceptual distances in sound. Cross a line and the sound has changed by a
measured amount.
THE SHEETS
Eleven of them, each a different set of four corners, each chosen by measuring
the whole library rather than by ear. They are grouped by what the measurement
found:
BRIGHT — HEHUAN, the brightest, where all four corners hold their own.
CONTRAST — BEIYIDUAN, the widest corner spread at 8.2 times.
BREATH — NENGGAO, the breathiest.
DEPTH — MABO, the deepest at 53 dB.
RANGE — YUSHAN, the widest at 66 semitones; JIAMING, the most focused at 17.
They are named after Taiwan's high mountain traverses.
PLAYING IT
Touch the sheet to sound it. The ribbon underneath sets pitch, or send MIDI and
play it from a keyboard. Press harder and the note opens up — the contact patch
of your finger is the dynamic. Hold on empty ground to drop a mark you can come
back to.
The readout above the ribbon tells you where you are while you are there:
brightness, noise, the grid reference, the frequency.
IN A HOST
Contour is also an AUv3 plug-in. It runs in AUM, GarageBand, Cubasis, Logic for
iPad and anything else that hosts Audio Units, with the position automatable as
two parameters and the sheet recallable with your session. The plug-in draws
the same map the app does, laid out for the window a host gives it.
WHAT IS FREE
Three sheets — BEIYIDUAN, NENGGAO and YUSHAN — with the whole instrument: the
map, the ribbon, MIDI, reverb, marks, and the plug-in. No time limit and no
account.
CONTOUR PRO
A single purchase, once, unlocks:
• All eleven sheets
• Recording, straight to a file
• The envelope panel — attack, decay, sustain, release
• Composing sheets of your own from the library, 4,845 combinations of four
corners, with the map baked for the pitches they share
Requires iOS 16 or later. iPhone and iPad.
Latest updates
1.0.4
Exports from your DAW come out clean, and a MIDI keyboard plugged into the app finally plays it.
In the app
• A MIDI keyboard plays Contour. It never did: every message from an external controller was misread and dropped.
• Recordings play back at the speed and pitch you played them. On most iPhones they came out about three times slower and more than an octave and a half low.
• Sound comes back after a phone call, Siri, an alarm, or plugging in headphones. Before, the instrument stayed silent until you quit and reopened it.
• Stopping a recording no longer freezes the screen, and a recording that fails says so instead of doing nothing.
• One damaged sheet file no longer hides every sheet you have baked.
• Previewing and baking a sheet takes about half the time.
• With nothing playing, nothing recording and no keyboard connected, Contour no longer keeps running in the background. With a keyboard connected it plays on as before.
• VoiceOver can buy Pro, restore a purchase, and close the Pro and Settings panels. None of their buttons could be reached before.
With a keyboard, in the app and in a host
• Playing legato no longer cuts off the note you are holding when you lift the one before it.
• Pitch bend returns to the note when the wheel comes back. In the app it used to climb further with every message.
• In the plug-in, the sustain pedal, pitch bend and aftertouch all work, and stopping the transport releases every held note.
In a host
• Exports and bounces are clean. A host renders an export much faster than real time and Contour could not keep up, so most of the file was silence broken by fragments of sound. It now renders at whatever speed the host asks, and the same project exports the same way every time.
• Exports keep the release and the reverb tail instead of cutting them off where the region ends.
• Notes land where the host places them. They were moved to the start of each buffer — up to 85 ms early in a large one.
• Automation ramps sweep instead of jumping straight to the end.
• Latency stays the same from the moment the plug-in loads, and long sessions over Bluetooth or USB audio no longer start to drop out.
• Deleting a sheet you baked no longer silences the one that is playing, and a saved project always reopens on the sheet it was saved with.
Thank you to the player who wrote in about exports.
