Comparison

KORG iM1 vs TM

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

Head to head
About

KORG iM1

This app faithfully reproduces the legendary M1 synthesizer, offering its iconic sounds and expanded features for modern music creation. It provides a vast library of presets and intuitive performance tools, making it accessible to both experienced musicians and beginners.

Highlights
  • Faithful reproduction of original M1 sound
  • Expanded filter resonance and 18 effects
  • Gigantic library of 3,300 sounds
  • Intuitive KAOSS pad for performance
  • Smart Sound Browser for quick sound selection
  • Compatible with KORG Gadget
Features
Currently charting
Read full description

A complete reproduction - and more - of the legendary M1 that defined an era. Mobile Digital Synthesizer for the iPad. ● Selected by Apple as "App Store Best of 2015" ● Ranked #1 on the App Store on Top Paid Music category in more than 20 countries! (15/5/27) Since it went on sale in 1988 the legendary M1 music workstation rapidly achieved record-breaking sales, becoming a mainstay of the music scene from the late 1980s and beyond. The common element of electronic instruments that have left their name in history is that they had a unique sound that was difficult if not impossible to replicate. Sounds such as the “M1 Piano” is instantly recognizable and have appeared on countless hit records over many years, and yet these are sounds that could only be produced by the M1. And that’s what you can now have on your iPad! ● A faithful reproduction of the original M1 Sound The PCM data provides the library of the original M1. For the hardware, we analyzed the circuit diagram of the original design, and completely replicated it in software down to the last detailed parameters. Engineers with an exhaustive knowledge of the M1 made careful adjustments in order to obtain the sound of the original unit, something that cannot be obtained simply by sampling the original sounds. ● A continued evolution of the M1 Not content with simply reproducing the original, iM1 provides further evolutionary developments. Synth parts now have the Filter Resonance that was requested at the time of the original. The effect parts, originally consisting of only two effects, have been powered-up to 18 effects. The user interface has also been refreshed with additions such as a KAOSS pad. iM1 is the ultimate version of the KORG M1. ● A gigantic library encompassing 3,300 sounds and 34 cards* In addition to all 19 of the ROM cards originally released for the M1, iM1 also covers the sounds of the M1EX which expanded the internal PCM of the M1, as well as the sounds of the T-series which appeared as an evolution of the M1. There’s also “BEST OF M1”, a selection of 100 great M1 programs. The new “Smart Sound Browser” makes it quick to find the desired sound. You can also view the sounds ranked by how often they are selected by iM1 users around the world. *with all the expansion card installed via in-app purchase ● KAOSS pad lets anybody perform iM1 features a KAOSS pad from the popular KAOSSILATOR, allowing you to perform intuitively just by touching the screen. By using the dual KAOSS pads to play phrases or adjust the sound, even people who are not accustomed to keyboard instruments or knowledgeable about synthesizers can enjoy performing the iM1. There’s also a conventional keyboard, as well as the “Smart Keyboard”, which lets you specify a scale setting and play phrases with a single finger. ● Use with KORG Gadget for song production iM1 can be used together with Gadget, the music production DAW app that won the App Store Best App of 2014 award in Japan. If both apps are installed, you can use iM1 as a sound module within Gadget, taking advantage of the program sounds in iM1 for music production. iM1 also supports Audiobus and Inter-App Audio, so it can also be used for GarageBand etc. ● Connect a MIDI keyboard and use as a sound module In addition to enjoying iM1 on its own, you can connect a USB MIDI keyboard* via a Lightning adaptor and play the iM1 as an external sound module. You can easily take along an even more powerful workstation sound module as part of your iPad-based compact mobile system. *microKEY, nanoKEY etc. ● Interchangeable with the KORG Legacy Collection and the original M1 Sounds that you create in iM1 can be sent from your iPad via iTunes to a Mac/PC. If you have the Legacy Collection M1, you can use those sounds in a DAW. More info at korg.com

About

TM

This application allows users to customize and organize sounds for their Roland TM-1 Trigger Module. Import your own samples or use the included pro-quality sounds, assign them to trigger inputs, and save custom kits for live performances or studio work.

Highlights
  • Customize TM-1 sounds
  • Import original samples
  • Access 150 pro-quality samples
  • Save and load custom kits
  • Assign MIDI note numbers
  • Supports WAV, AIFF, MP3, AAC, Apple Lossless
Read full description

Customize and Organize TM-1 Sounds from Your Mobile Device The free TM-1 Editor app provides a powerful command center for customizing your Roland TM-1 Trigger Module for different stage and studio performances. The app gives you the ability to import your own original samples, and includes 150 pro-quality samples to work with as well. Via a simple interface, you can assign sounds to the trigger inputs and edit various parameters, and then save your setups as custom kits on your device.* To prepare for the gig, simply connect your device, transfer the desired kits to the TM-1’s onboard memory, and you’re ready to go! Kits load almost instantly, making it easy to change up sounds as needed between sets. *The number of kits that can be stored is dependent on the available memory in your device. Features : - Create customized kits for the TM-1 - Import your own original samples or choose from 150 ready-to-play samples included with the app - Save and load whole kit combinations and setups - Assign MIDI note numbers for the TM-1’s trigger-to-MIDI function - Compatible formats: WAV, AIFF, MP3, AAC, Apple Lossless

Screenshots

KORG iM14 screens
TM4 screens

Verdict

The call

The clearest difference is price: TM at Free against KORG iM1's $29.99. TM also leads on in-app purchases (none vs 2) and update cadence (fortnightly vs every 7 months). KORG iM1's advantage is rating (4.7 vs 4.3) and ratings volume (1K vs 4). 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

CostPrice · In-app purchases · Ads · Monetization

TM is free to download; KORG iM1 costs $29.99 up front. KORG iM1 sells 2 one-off in-app purchases. TM asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

KORG iM1 holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: KORG iM1 has 1K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 82% of KORG iM1's written reviews are positive against 100% of TM's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

KORG iM1 ships an update every 7 months, TM fortnightly. Both last shipped on October 24, 2026.

Scorecard9 real differences · 2 level
KORG iM1 versus TM: the parameters behind the verdict, then further details
ParameterKORG iM1TM
Price$29.99Free — better
Rating4.7 (1K ratings) — better4.3 (4 ratings)
Positive reviews81.5% of reviews100.0% of reviews — better
Number of ratings1K — better4
Update frequencyEvery 7 monthsFortnightly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank#166 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.010.0 — better
Further details — not scored
Size200 MB38 MB
Age rating4+4+
DeveloperKORG INC.Roland Corporation

Customer experience

KORG iM1

All ratings1,007 ratings
Positive93.8%
Neutral2.3%
Negative3.9%
Written reviews487 reviews
Positive81.5%
Neutral7.4%
Negative11.1%

TM

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

KORG iM1

Reported bugs

3 issues
  • Disappearing or missing purchased sound cards
  • Bluetooth MIDI connectivity issues
  • Compatibility problems with certain iOS versions or devices

Requested features

4 requests
  • Add AUv3 support for better DAW integration
  • Improve preset management and saving capabilities
  • Increase master volume control options
  • Expand sound library with more cards/expansions

TM

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

KORG iM1

One-time2
  • M1 Cards Pack$4.99
  • T1 Cards Pack$4.99
None

TM

No in-app purchases

Questions

Is KORG iM1 free?
KORG iM1 costs $29.99, and also offers in-app purchases.
Is TM free?
TM is free to download, with no in-app purchases.
Which has better reviews, KORG iM1 or TM?
KORG iM1 is rated higher. KORG iM1 averages 4.7 out of 5 from 1K ratings, while TM averages 4.3 from 4 ratings.
Do KORG iM1 or TM have ads?
Neither KORG iM1 nor TM shows ads.
Which is updated more often, KORG iM1 or TM?
KORG iM1 ships an update every 7 months, and TM fortnightly. Most recently, KORG iM1 was updated on October 24, 2026 and TM on October 24, 2026.

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