Comparison

Rivet 03 vs Choppa

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

Head to head
About

Rivet 03

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Rivet 03 - Verb is a three-engine reverb with drive, degradation, and gating built for techno and industrial. Put it on drums, synths, or any bus to add space, from tight concrete rooms to gated snares to lush, blooming swells. Verb works both as a standalone app and an AUv3 plugin. Verb combines the MV2 reverb engine with pre-filters, saturation, lo-fi grit, and tempo-synced gating. Three distinct engines cover tight rooms, 80s gated snare snap, and reverse-style atmospheric swells. KEY FEATURES • Three reverb engines: Concrete (tight rooms), Pit (gated snare), Bloom (swells) • DRIVE saturation and GRIT lo-fi degradation • CLAMP tempo-synced gating with STAGGER rhythmic pulses RIVET SERIES / OPEN SOURCE • Verb is part of my Rivet series of AUv3 effects plugins targeting techno and industrial genres. Verb uses the MV2 algorithm by Chris Johnson (Airwindows), made available under MIT license. REQUIRES • An AUv3-compatible iOS/iPadOS host (for example: AUM, Audiobus, Logic Pro, GarageBand, Loopy Pro, etc.) AUv3 Effect • Works in AUv3 hosts such as AUM, Drambo, Logic, and Cubasis IN-APP PURCHASE Verb includes In-App Purchases for optional tipping. Tipping does not unlock any additional features as all features are already available.

About

Choppa

Record audio, chop it into playable pads, and manipulate it like an instrument. This app offers advanced features like vinyl scratching, chord progressions, and wireless DAW integration for musicians and producers.

Highlights
  • Record and chop audio to pads
  • Vinyl scratching and pitch bending
  • Chord progressions and layered harmonies
  • Auto-chop by transient or pitch
  • Wireless DAW integration (Ableton Link)
  • AUv3 plugin support
  • Multiple input sources
Features
Currently charting
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Record into your mic. Chop it to pads. Play it like an instrument. Now scratch them like vinyl and play in chord progressions. Choppa is a lightning-fast audio sampler and slicing tool built for songwriters, beatmakers, and live performers. Record through your mic and instantly map audio across playable trigger pads. Auto-chop on transient or pitch detection — switch between 4 / 8 / 16 pad layouts without losing any of their per-chop settings. PERFORMANCE GESTURES Tap to trigger. Hold to sustain. Drag a single finger up and down on a pad to slide pitch in real time — ±2 octaves without lifting. Drop a second finger anywhere on the screen and any held chop slows like a record being touched. Move the second finger and you scratch in either direction. Lift to release the platter — a force-based exponential inertia model (modeled on real turntable physics, not a linear fade) ramps back to nominal speed. Spread your fingers wider and the scratch responds more gently — a "grip pressure" metaphor borrowed from real decks. The chop view and minimap both work as scrub surfaces. The minimap ignores chop boundaries entirely — drag freely across the whole loop as one continuous tape. CHORD PLAY PERF mode has two flavours: SCRATCH for turntable gestures and CNFG for chord play. CNFG's MONO/POLY toggle controls whether each pad press chokes the previous (one voice at a time) or lets multiple voices stack while held — piano-key hold-to-play for chord progressions, sustained harmonies, and layered counter-melodies. CHOPPING Auto-chop detects transients or pitch boundaries automatically when you record or import a sample, with sensitivity knobs for each. Drag chop edges manually, set per-section pitch and gain, enable reverse, and pick between off / forward loop / ping-pong on any chop. Three pad-count layers (4 / 8 / 16) are fully independent — switch between them and all per-chop settings stay intact. INPUT SOURCES Pick what feeds Choppa: any mic capsule (front / back / bottom / USB / AirPods), the two royalty-free streams that ship with the app, or any HTTPS audio URL you paste in. Record from any of them. RECORD MODE A dedicated REC mode for capture work, with an ARM safety pin — destructive full re-record requires a deliberate ARM tap so a stray REC press can't write over a take. Punch-in records into a single chop's region only, with single-level undo — perfect for fixing a flubbed beat without losing the rest. WIRELESS TO YOUR DAW Ableton Link Audio — Choppa's master mix appears as a track-input source in Live, Loopy Pro, AUM, GarageBand iOS, and any Link 4 peer on the same Wi-Fi. Tempo syncs at the same time. No USB cable, no virtual audio device. PLUGIN INSIDE YOUR DAW Full AUv3 plugin support — load Choppa inside GarageBand, Logic Pro for iPad, AUM, Loopy Pro, or any Audio Unit host as either an Instrument (play chops via host MIDI) or an FX (capture the host's audio for chopping). MIDI mappings persist per host. LIBRARY + SHARE Every recording auto-saves into an App Group library shared between Choppa standalone and the AUv3 plugin — record a sample on your phone, load it in your DAW the next time you open it. Share to Choppa from any other app and pick which bank receives the sample, plus the chop count, before it lands. EXPORT Export source WAV, individual chops, .choppa single-bank presets, or full .choppap multi-bank projects. Import from other Choppa users or any audio file. Built by WaveLoop. Get off the grid.

Screenshots

Choppa4 screens

Verdict

The call

The clearest difference is price: Rivet 03 at Free against Choppa's $4.99. Choppa's advantage is in-app purchases (none vs 3) and chart position (#188 vs unranked). On 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

CostPrice · In-app purchases · Ads · Monetization

Rivet 03 is free to download; Choppa costs $4.99 up front. Rivet 03 sells 3 one-off in-app purchases. Choppa asks for nothing beyond the download.

Scorecard4 real differences · 7 level
Rivet 03 versus Choppa: the parameters behind the verdict, then further details
ParameterRivet 03Choppa
PriceFree — better$4.99
Rating—4.3 (6 ratings) — better
Positive reviews—66.7% of reviews
Number of ratings—6 — better
Update frequency—Every 2 weeks
Ads—No
In-app purchasesYesNo — better
Monetization—Paid
Best chart rank—#188 — better
Devices—iPhone, iPad — better
Requires iOS17.617.0 — better
Further details — not scored
Size4 MB10 MB
Age rating4+4+
DeveloperJoe TopjianElijah Lucian

In-app purchases

3 purchases

Rivet 03

One-time3
  • Tip - Small$0.99
  • Tip - Medium$1.99
  • Tip - Large$3.99
None

Choppa

No in-app purchases

Questions

Is Rivet 03 free?
Rivet 03 is free to download, with in-app purchases available.
Is Choppa free?
Choppa costs $4.99, with no in-app purchases.

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