Bounce vs 4Comp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Bounce
Create music anywhere with a powerful mobile studio. Describe your desired sound or melody, and AI will generate it, providing editable tracks. Features include multitrack recording, clip editing, built-in instruments, and AUv3 hosting.
- AI-generated music from text prompts
- Editable MIDI and audio clips
- Multitrack recording with latency compensation
- Built-in instruments and sampler
- AUv3 plugin hosting
- Stem export and auto-mastering
- Offline functionality
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Bounce is a full music studio in your pocket — start from a prompt, a sample, a song you want to flip, or a blank session, and every piece stays yours to edit. SHARE IT — NEW Turn any project into a link anyone can open and play — no app required. They tap to listen, then "Open in Bounce to remix" drops the whole editable project on their timeline. Export a vertical video for TikTok/Reels in one tap, with a reactive visualizer. Invite a friend and you both get credits. START BY TYPING A VIBE — NEW First launch: describe what you want — "dark drill in F minor," "sunny afrobeats" — and a full, editable project is waiting for you. FLIP IT — NOW IN TEMPO Pick any song and Bounce pulls it apart: vocals, drums, bass, and the rest, each an editable track. New in 2.9: Bounce detects the song's tempo, so the stems land in time and follow the project's BPM. (Flip music you have the rights to use.) PLAY & CHOP — NEW SAMPLER The Perform pads got a redesign: a waveform strip shows your sample, drag the chop points wherever the hits are, and each pad lights its slice as you play. SPARK — FROM PROMPT TO PROJECT Type what you want and Spark builds a full, editable project in seconds. Re-roll any part and it stays in key and in harmony — even after you close the app. TALK TO YOUR PROJECT "Make it darker." "Re-roll the drums." "More reverb on the melody." Every change undoable in one tap. BOOTH — RECORD VOCALS Lyrics on screen, takes, comping, punch-in, vocal tune, one-tap vocal chains. PLUS THE FULL STUDIO • Multi-track recording, tempo-synced loops, cycle playback • A real mixer with honest meters + auto-mix that listens • AUv3 instruments and effects, Bounce Sampler • Generate a Sound & Sing a Hook (editable AI clips, credits) • Export a finished mix, stems, a social video, or a shareable link What you make is yours.
4Comp
This audio plugin offers four distinct analog-style compressor models (FET, VCA, Optical, Vari-Mu), each with its own sound and interface. It provides advanced features like stereo linking, sidechain filtering, and real-time transfer curve visualization.
- Four analog compressor models (FET, VCA, Optical, Vari-Mu)
- Unique DSP engine and interface for each model
- Live transfer curve visualization
- Stereo link and sidechain high-pass filter
- Dry/wet mix and auto make-up gain
- 17 presets included
- 0-sample latency
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Four analog-style compressors in one AUv3 plugin: FET, VCA, Optical and Vari-Mu. Each is its own DSP engine with its own sound, and the whole interface — face, knobs, meters — changes to match the one you pick. New in 1.1: tap ? for a quick start and a guide to each model, and watch the live transfer curve on VCA. FET Fast gain reduction from a feedback detector, with an all-buttons mode. Hi-hats, drum buses, spiky guitars. Ice-blue face. VCA Bus glue with program-dependent AUTO release. Tames transients and spikes without grabbing. Crimson face. Optical Smooth, level-dependent release from a modelled photocell — the cell's light memory. Vocals, brass, strings. Electroluminescent-green face. Vari-Mu A ratio that rises with level, plus harmonic colour that thickens thin tracks. Mix bus and mastering. Brass face. Four separate DSP paths Each model is its own compressor engine rather than a preset over one circuit: feedback FET, two-stage VCA, photocell release, rising-ratio tube. Switch faceplates mid-session and the plugin animates to the new model's look. Complement it Stereo link (Linked or Dual Mono), sidechain high-pass, dry/wet mix, input/output and auto make-up gain, a gain-reduction meter styled for each model and 17 presets. Real-time-safe DSP, 0-sample latency by default. Works in GarageBand, AUM, Cubasis, Loopy Pro and other AUv3 hosts on iPhone and iPad.
Screenshots
Verdict
The clearest difference is price: Bounce at Free against 4Comp's $4.99. Bounce also leads on update cadence (every 3 days vs weekly) and ratings volume (3 vs 1). 4Comp's advantage is in-app purchases (none vs 5). On rating, ads, 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
Bounce is free to download; 4Comp costs $4.99 up front. Bounce sells 5 one-off in-app purchases. 4Comp asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for Bounce against 5.0 for 4Comp. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
Bounce ships an update every 3 days, 4Comp weekly. The most recent releases landed on October 6, 2026 and October 16, 2026 respectively.
| Parameter | Bounce | 4Comp |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 5.0 (3 ratings) | 5.0 (1 ratings) |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 3 days — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.0 — better |
| Further details — not scored | ||
| Size | 19 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Casey Olayos | NATHAN THOMAS MATHIS |
Customer experience
Bounce
4Comp
In-app purchases
Bounce
- Essentials Vol. 1Free
- Spark Pack$4.99
- Studio Pack$9.99
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- Bounce Pro$19.99
- Producer Pack$24.99
4Comp
No in-app purchases









