JamEngine vs JamJar

JamEngine is a real-time music generation app that puts a full backing band in your pocket. Choose from 15 musical styles, pick your key and tempo, and JamEngine instantly creates authentic, genre-appropriate arrangements, complete with MIDI drums, bass, guitar, piano, brass, and woodwind instruments. Whether you're a guitarist looking for a rhythm section to practice over, a songwriter sketching out chord progressions, a jazz player working on improvisation, or a producer hunting for inspiration, JamEngine gives you a responsive, endlessly variable musical companion. 15 STYLES TO CHOOSE FROM Rock · Hard Rock · Classic Rock · Metal · Pop · Ballad · Blues · Slow Blues · Jazz Swing · Jazz Ballad · Funk · Bossa Nova · Reggae · Country · Lo-fi Each style comes with genre-authentic drum patterns, bass lines, guitar voicings, keyboard parts, and horn arrangements. 12 INSTRUMENTS Build your arrangement from a roster of 12 instruments, each with realistic General MIDI sounds: • Drums · Bass · Electric Guitar · Acoustic Guitar • Piano · Organ · Strings • Trumpet · Trombone · Alto Sax · Tenor Sax · Clarinet Mix and match any combination. Each instrument has independent volume, mute, solo, pan, density and 11 variation levels to control the complexity and character of its part. SMART CHORD PROGRESSIONS Build chord progressions using the grid editor or the interactive Circle of Fifths, a visual tool that highlights diatonic chords in your selected key, so you can see at a glance which chords belong together. Start from scratch, or load one of the built-in templates: I-IV-V, I-V-vi-IV, ii-V-I, 12-Bar Blues, Jazz Turnaround, and more. Choose from 18 chord types including major, minor, seventh, diminished, augmented, sus, and extended chords. FLEXIBLE TIME & KEY Play in any of 7 time signatures, 2/4, 3/4, 4/4, 5/4, 6/8, 7/8, and 12/8, with BPM from 40 to 300. Tap tempo to match a song. Select any of the 12 keys in major or minor. Change key mid-session and your chord progression transposes automatically to preserve harmonic relationships. VARIATION RANDOMIZER Enable the variation randomizer and JamEngine will shuffle instrument variations at musically appropriate boundaries, every 4 or 8 bars, keeping your practice sessions fresh and unpredictable without you lifting a finger. EXPORT YOUR SESSIONS Capture your jam as a WAV, M4A, or multitrack MIDI file. Use export to bring your arrangements into your DAW for further production. SONGBOOK Save your favorite sessions, style, key, tempo, chord progression, and instrument setup to your personal Songbook. Load them instantly to pick up where you left off. CUSTOM SOUNDFONTS Import your own SF2 SoundFont files to customize the sound of every instrument. FREE TO START, PRO TO UNLOCK EVERYTHING JamEngine is free with 4 styles (Rock, Metal, Jazz Swing, Lo-fi), 3 song saves, and all playback features. Upgrade to JamEngine Pro for a one-time purchase to unlock all 15 styles, unlimited song saves, and full export capabilities.

JamJar keeps your whole song collection in one place: sheet music, chord charts and lyrics, organized, searchable and synced across iPhone, iPad and Mac through your own iCloud. As a hobby musician, my music was scattered everywhere: PDF books, tunes from public-domain archives, photos of pages off my shelf and several music apps. Finding a song again was harder than playing it, so I built JamJar to be one shelf for all of it. NEW: TURN A SCAN INTO SHEET MUSIC YOU CAN EDIT • Convert to Sheet Music (ABC) reads a printed page, scan or PDF and writes it out as a new song you can edit, transpose and play back • Bars it isn't sure of are flagged for you to check against the original, which stays untouched beside it • Runs on your device, offline, after a one-time download of about 1.6 GB • Works best on printed single-staff music such as lead sheets, fake books and tunebooks. Handwritten pages are unreliable, and lyrics aren't read • Needs a device with plenty of memory. On others the command is hidden and the rest of JamJar works as usual NEW: WRITE MUSIC ON THE SCORE • Tap a note to change its length, accidental or pitch, or drag it up and down the staff • Enter notes from an on-screen piano, or type them on a keyboard without writing any ABC • Add chord symbols, ties, triplets and other tuplets, repeats and endings, D.C. and D.S. marks, articulations and dynamics • Hear every note as you enter it • Full bars close themselves, and bars that don't add up are flagged • The score and its ABC source stay in step, so you can edit whichever is quicker BRING YOUR OWN MUSIC • Import single songs or whole books as PDFs and images • Scan paper books with the camera on iPhone or iPad • Split a scanned book into separate songs automatically, titled for you • Search open tune archives, or describe the tune you're after in your own words • Open files from the apps you already use: ChordPro, ABC, OnSong, OpenSong, iReal Pro and MusicXML PRACTICE WITH A BACKING BAND • Hear ABC, MusicXML and iReal Pro charts played with melody, chords, bass and drums, in a groove that suits the tune • Fade each part on the mixer, or pull one out and play it yourself • Loop a tricky passage, with a metronome and count-in ON STAGE WITH PERFORMANCE MODE • One chart, full screen, with the screen kept awake • Turn to the next song with a swipe, the keyboard or a Bluetooth page-turn pedal • Editing is locked, so nothing changes by accident mid-set • Build set lists and share them with your bandmates CREATE, EDIT AND ORGANIZE • Write songs as lyrics and chords (ChordPro), sheet music (ABC) or chord charts • Transpose to any key • Draw and highlight on your sheet music • Tag, search and filter your library • Ask about a song in plain language, or ask for changes such as tidying the chords, powered by Apple Intelligence • Automate with Siri and Shortcuts • Private sync through your own iCloud: no account, no sign-up JamJar speaks English and Swedish, with more languages on the way. Whether you're rehearsing, teaching or on stage, JamJar keeps every song ready to play.