Comparison

Knob Lab vs Ribn

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

Head to head
About

Knob Lab

This application transforms your iOS device into a versatile MIDI controller. It allows you to manage various DAWs and music software remotely via USB, WiFi, or Bluetooth. Create intricate control setups with a single rotary knob, affecting multiple MIDI destinations simultaneously.

Highlights
  • Remote DAW control
  • USB, WiFi, Bluetooth connectivity
  • Virtual MIDI support
  • Audiobus integration
  • Complex control mapping
  • iPad support
  • MIDI logger
Features
Read full description

Knob Lab turns your iPhone or iPad into a MIDI controller built around one idea: a single knob can do many things at once. ONE KNOB. MANY MOVES. Map a knob to up to 8 MIDI destinations. Each has its own range, direction, channel and colour, so one turn can open a filter, pull the resonance back and bring the delay in over the second half of the sweep. BUILD YOUR OWN MACROS • Control Change, Program Change and Pitch Bend destinations • Name every knob and every destination, so a setup reads at a glance • Invert any range, or start a destination part-way through the turn • Rotate completely, snap to middle, pan left/right, or return to origin on release • A coloured lane for every destination shows where each one is A LAYOUT FOR EVERY SETUP Start with one big knob, or unlock layouts with 2, 6 or 12 knobs on a single screen. PLAYS WITH EVERYTHING • Music apps on the same device, through Knob Lab's virtual MIDI output • Computers over Wi-Fi, with a network MIDI session • A Mac over USB or Bluetooth, with Sonic Logic Central • Class-compliant USB MIDI interfaces and synths plugged into your iPhone or iPad MADE FOR TOUCH Large, precise knobs, a quick guided start, and Dark, Light and Neon themes. The one-knob layout is free. The 2, 6 and 12 knob layouts are in-app purchases, available one at a time or all together.

About

Ribn

This app provides a unique MIDI controller experience with 8 assignable ribbons. It allows you to record and loop finger movements, adding organic modulation to synthesizers and effects. Control various MIDI-responsive gear, from hardware synths to software instruments.

Highlights
  • 8 MIDI CC ribbon pads
  • Record and loop finger movement
  • Configurable MIDI channel and CC# per ribbon
  • Turn off looping for regular slider functionality
  • Switch between 3 sets of configurations with presets
  • MIDI sending in background
  • iPad landscape mode
Features
Read full description

Ribn is a MIDI controller with 8 assignable ribbons. What makes Ribn unique is its ability to record and loop your finger movement. This allows you to add organic repeating modulation to your synths and effects, kind of like complex LFOs. You can assign a unique MIDI channel and CC# to each ribbon. As long as your gear responds to MIDI CC messages you will be able to control it with Ribn. ** FEATURES ** • 8 MIDI CC ribbon pads • Add modulation to your MIDI hardware synths, effects, eurorack modulars, drum machines, etc. • Configurable MIDI channel and CC# per ribbon • You can name each ribbon to help you identify what parameter it's controlling • Turn off looping on individual ribbons to turn them into regular sliders • Choose any number of ribbons between 1 and 8 • Full screen mode (removes navigation bar to help you focus) • Switch between 3 sets of configurations using presets • MIDI sending works while the app is in the background • iPad landscape mode • Select multiple MIDI outputs • Ribbons record and loop your finger movement • Use a wired MIDI interface, Bluetooth or Wi-Fi • All settings are saved automatically • Works with external hardware as well as other iOS synths • Works on iPhone (including iPhone X) and iPad starting with iOS 10 ** EXAMPLE USES ** • Control hardware MIDI synths parameters like the filter cutoff frequency, resonance, oscillator octave, etc. • Control any soft synth in Ableton Live (or your favorite DAW) by connecting your iOS device to your Mac via Wi-Fi and choosing "Session 1" as the MIDI output in Ribn. • Control your Eurorack modules by running Ribn through a MIDI to CV converter. • Control other iOS synths like the Moog Model 15 or Arturia iSEM. • Control drum machines and effects. For example, try controlling the room size of a reverb effect unit with a looping ribbon or the snappiness of a snare drum on a drum machine. The possibilities are endless. • Daisy chain your MIDI hardware using MIDI Thru ports and assign each ribbon to a different MIDI channel. This way you can control more than one piece of hardware at a time. For example, you can assign the first 4 ribbons to a synth and the last 4 to an effect unit. ** HOW IT WORKS ** • Connect your MIDI gear (like a synth) to your iOS device using a MIDI interface (wired or bluetooth) • Launch Ribn and select your MIDI interface in the settings page. • Find out which CC# and MIDI channel your gear responds to (usually at the end of the manual) and enter this information in RIbn's edit view. • Slide your finger on a ribbon to send CC values and control the parameters on your MIDI gear. ** WHAT IS MIDI AND CC? ** • MIDI is just the way electronic musical instruments talk to each other. • CC (Continuous Controller) is just a way to control various parameters using MIDI. For example, a synth's filter cutoff frequency can be controlled using a MIDI CC signal. ** NOTE ** • Ribn is a MIDI controller and doesn't produce any sounds. To use Ribn you must connect it to a device that responds to MIDI CC signals (check your gear's manual to be sure). • Ribn doesn't send note data, it only sends CC signals (you can't play melodies with it, but you can control various parameters like synthesizer filters, or effects settings). • To connect your iOS device to MIDI gear you will need to buy a MIDI interface. A MIDI interface typically connects to your iOS lightning port and provides standard MIDI DIN ports to connect to your hardware. There are also bluetooth MIDI interfaces that connect wirelessly. Alternatively, you can connect to your Mac over Wi-Fi and control software synths that way. This setup is a little more complex but totally doable (I've tested controlling Ableton Live plugins over Wi-Fi with Ribn and it worked perfectly). • Audiobus and AUv3 are not supported at this time. However, you can still control other iOS synths by routing the internal MIDI ports and having Ribn run in the background.

Screenshots

Knob Lab4 screens
Ribn4 screens

Verdict

The call

The clearest difference is price: Knob Lab at Free against Ribn's $3.99. Ribn's advantage is rating (4.8 vs 4.3) and in-app purchases (none vs 4). On review sentiment, ratings volume, 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

CostPrice · In-app purchases · Ads · Monetization

Knob Lab is free to download; Ribn costs $3.99 up front. Knob Lab sells 4 one-off in-app purchases. Ribn asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Ribn holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 12 and 30 respectively. Written reviews point the same way: 85% of Knob Lab's written reviews are positive against 91% of Ribn's.

UpkeepUpdate frequency

Knob Lab ships an update every 5 months, Ribn every 3 days. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

Scorecard6 real differences · 4 level
Knob Lab versus Ribn: the parameters behind the verdict, then further details
ParameterKnob LabRibn
PriceFree — better$3.99
Rating4.3 (12 ratings)4.8 (30 ratings) — better
Positive reviews84.6% of reviews90.9% of reviews — better
Number of ratings1230 — better
Update frequencyEvery 5 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.010.0 — better
Further details — not scored
Size66 MB28 MB
Age rating4+4+
DeveloperUri NachmiasNebojsa Petrovic

Customer experience

Knob Lab

All ratings12 ratings
Positive83.3%
Neutral8.3%
Negative8.3%
Written reviews13 reviews
Positive84.6%
Neutral0.0%
Negative15.4%

Ribn

All ratings30 ratings
Positive96.7%
Neutral0.0%
Negative3.3%
Written reviews33 reviews
Positive90.9%
Neutral3.0%
Negative6.1%

In-app purchases

4 purchases

Knob Lab

One-time4
  • Two Knob Layout$0.99
  • Four/Six Knob Layout$0.99
  • Nine/Twelve knob layout.$0.99
Show 1 more
  • Unlock all layouts$1.99
None

Ribn

No in-app purchases

Questions

Is Knob Lab free?
Knob Lab is free to download, with in-app purchases available.
Is Ribn free?
Ribn costs $3.99, with no in-app purchases.
Which has better reviews, Knob Lab or Ribn?
Ribn is rated higher. Knob Lab averages 4.3 out of 5 from 12 ratings, while Ribn averages 4.8 from 30 ratings.
Do Knob Lab or Ribn have ads?
Neither Knob Lab nor Ribn shows ads.
Which is updated more often, Knob Lab or Ribn?
Knob Lab ships an update every 5 months, and Ribn every 3 days. Most recently, Knob Lab was updated on October 13, 2026 and Ribn on October 16, 2026.

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