PX1 FM Synth vs Bungee
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PX1 FM Synth
Create rich, wide stereo sounds with a dual-engine FM synthesizer. Explore classic 1980s digital synth tones, from electric pianos to metallic bells, with extensive operator and envelope controls. It functions as a standalone app or an AUv3 plugin for music production.
- Dual independent 6-operator FM engines
- 32 classic FM algorithms
- Per-operator envelopes and pan
- Five macro knobs for sound shaping
- Built-in reverb
- AUv3 plugin support
- Random patch generator
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PX1 is a dual-engine FM synthesizer inspired by the classic 6-operator digital synths of the 1980s. Each engine features six operators, 32 algorithms, and full envelope control — giving you everything from glassy electric pianos and punchy basses to evolving pads and metallic bells. What makes PX1 special is the dual-engine architecture. Two completely independent FM voices run side by side. Copy one engine to the other, make subtle changes, then use the Spread control to place them across the stereo field. The result is a lush, wide sound that a single FM engine simply cannot produce. FEATURES • Two independent 6-operator FM engines • 32 classic FM algorithms • Per-operator envelopes (4 rates + 4 levels) • Per-operator pan for detailed stereo placement • Five macro knobs — Brightness, Touch, Attack, Decay, Spread • Copy/Paste between engines for instant layering • Random patch generator exploring the classic FM sound palette • Built-in reverb (Size, Damp, Amount) • Mono, Legato, and Portamento modes • LFO with triangle, saw, square, and random waveforms • Pitch bend range and transpose controls • Key velocity sensitivity per operator • Keyboard rate scaling and level scaling • Operator Key Sync on/off for consistent or organic attacks AUv3 PLUGIN PX1 works as a standalone instrument and as an Audio Unit v3 plugin. Load it directly inside GarageBand, Logic Pro, AUM, Cubasis, or any AUv3-compatible host. Full parameter automation is supported — record knob movements in your DAW and play them back. DESIGNED FOR MUSICIANS The interface stays close to the original FM programming model that experienced synthesists know, while macro controls make it approachable for anyone. Turn one knob and shape the entire sound; dive into individual operators when you want surgical control. LISTEN TO EXAMPLES Hear PX1 in action — sound demos are available at: https://soundcloud.com/peter-sj-gren/sets/px1-demo Requires no in-app purchases. No subscriptions. No ads. No tracking.
Bungee
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Bungee turns your iPhone and iPad into a musical instrument. Touch the screen to play a granular synthesizer, pluck glowing stripes like strings, and let sequences and drum beats play along. No music theory needed: every note fits the scale, so everything you play sounds musical. Made for ambient music, beats, sound design and live jamming, from your first touch to a full performance. PLAY THE PLATE Every finger sprays clouds of tiny grains of sound. Move left and right to travel through the sound, up and down to change the grain size, press harder for denser clouds and swipe fast for stutter bursts. Up to ten fingers play at once. PLUCK, HOLD AND STRETCH STRIPES The stripes behave like strings. Pluck them, hold them to sustain, stretch them until they snap, or bow them with a slow swipe. Hold one stripe with up to four fingers and pull: the note rises as it stretches. Each stripe plays a note of the scale, and you can draw your own. THROW THE NODES Nodes sit on the stage and play whenever a stripe touches them. Drag them into place, or flick one and it flies across the stage like a bullet, bouncing off the edges and plucking every stripe it crosses. TEN LOOKS, ONE INSTRUMENT Pick a theme and the whole app changes with it, from the stage to the menus: - Chrome: liquid-metal strings and mirror-polished shapes (the default) - Clay: soft white clay on black - Neo Brutalism: bold colour, thick outlines, hard shadows - Acid: poster neon, holographic shapes and acid smileys - Pixel: 8-bit stripes and sprites, with a pixelated sound to match - Op Art: hairline stripes on a bending grid - Thermal: a heat camera where every pluck glows white-hot - Glacier: false-colour satellite maps - Orbit: planets gliding along luminous orbits - Bubble: liquid bubbles on cream Your home-screen icon can follow the theme too. 56 READY-TO-PLAY INSTRUMENTS Every template is a complete instrument with its own sound, stripes, effects and sequence, laid out on shelves: Techniques, Ambient, Melodic, Beats, Drums and Glitch. Long-press any template to preview it or star it. Or start a New project on an empty stage. LEARN IN NINE STEPS The guided tour shows each move on the stage, waits for you to try it and moves on: playing, swiping, the sequence, drawing stripes and working with nodes. DRUM MACHINES BUILT IN Ten drum templates play real beats: footwork, house, boom bap, bongos, metal, wood, chiptune, IDM clicks, water drums and half-time trap. Play along on the stripes. SOUND NODES AND SAMPLES Drop sample, synth, noise and drone nodes on the stage and play them by holding or dragging, each with its own volume. Choose from 13 built-in samples (kalimba, felt piano, Rhodes chords, tape choir, rain, birds, shortwave radio and more), or import your own audio from Files: WAV, MP3, M4A, AIFF, FLAC and OGG. SEQUENCER Pick a pattern and a tempo, or open Advanced for the step grid, Euclidean and Turing patterns, swing and direction. Sequences drive the notes, move nodes and animate the stage in time with the music. EFFECTS AND MIXER Shape your sound with reverb, delay, phaser and drive, and balance everything in a touch-friendly mixer. MIDI, AUV3 AND ABLETON LINK - Use Bungee as an AUv3 instrument inside your favourite host app - Connect a MIDI controller and it maps itself: Korg nanoKONTROL2, Novation Launch Control XL, Launchkey Mini and more, plus MIDI learn for anything else - Sync the tempo with other apps and devices over Ableton Link MAKE IT YOURS - Save projects and your own templates, and share them - A retro terminal view that shows every event as you play WHO IT'S FOR - Ambient, lo-fi and electronic musicians looking for new textures - Beatmakers who want a playful drum machine - Sound designers who want a hands-on granular synth - Beginners who want to make music without learning an instrument Everything is generated live on your device. No account, no sign-up, no subscription. Touch the screen and start playing.
Screenshots
Verdict
The clearest difference is price: Bungee at $9.99 against PX1 FM Synth's $14.99. Bungee also leads on update cadence (every 5 days vs every 2 weeks). On ads, in-app purchases, device support and iOS requirement 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
PX1 FM Synth costs $14.99 and Bungee $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PX1 FM Synth ships an update every 2 weeks, Bungee every 5 days. The most recent releases landed on October 8, 2026 and October 13, 2026 respectively.
| Parameter | PX1 FM Synth | Bungee |
|---|---|---|
| Price | $14.99 | $9.99 — better |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 2 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 121 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Peter Sjogren | Ibrahim Sefa Tuna |
In-app purchases
PX1 FM Synth
No in-app purchases
Bungee
No in-app purchases









