RasterFX vs SimpleSampler
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
RasterFX
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Make any sound move. RasterFX is a playable modular multi-effects processor for iPhone and iPad. Use it standalone with a microphone, an imported audio file or built-in signals β or load it as an AUv3 audio effect in AUM, GarageBand, Logic Pro for iPad, Loopy Pro, Cubasis and other Audio Unit hosts. BUILD YOUR EFFECT CHAIN Choose from Filter, Delay, Drive, Reverb, Grain, Repeat, Motion and Dynamics. Arrange up to six plates in series or split them into parallel A/B paths. Reorder the chain and the sound changes with it. MODULATE ANY CONTROL Patch LFOs, envelope followers, random and chaos sources, step sequencers, MIDI, macros, the XY pad or device tilt to any control. Create up to 16 modulation lines, with live arcs showing exactly how the sound is moving. PERFORM THE PATCH Morph between four snapshots on the XY pad. Turn eight macros. Hold four momentary throws for stutter, sweep, reverse and freeze. RasterFX is built to be played with one hand, not programmed and left alone. GENERATE, LOCK, EVOLVE Nudge a patch, reshape it or roll a new one. Lock the parts you want to keep, undo any result and save the seeds worth returning to. Evolve lets the patch drift over time while staying anchored to the sound you chose. SEE WHAT YOU HEAR Every effect has its own live visualizer. The CRT and halftone interface makes filters, delay taps, grains, dynamics and modulation visible without turning the screen into a wall of meters. RECORD THE RESULT Record the processed output to WAV, rename takes and share them from the app. FREE TO START. PRO ONCE. Free includes all eight effects, all modulation sources, every factory preset, three plates, four modulation lines and 60-second recordings. No ads, account, watermark or reduced audio quality. RasterFX Pro is a one-time purchase β not a subscription. It unlocks six plates, 16 modulation lines, split routing, XY snapshot morphing, Evolve, A/B compare, unlimited recording length and your own saved presets. Your saved sound always plays back exactly as created, even if it uses Pro features; Free limits editing, never playback. Made for headphones, late at night.
SimpleSampler
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SimpleSampler turns any sound into an instrument. Record a piano note, a clap, your voice or a glass you tap with a spoon. The app detects the pitch and puts the sound on a keyboard, so you can play it across several octaves right away. RECORDING Press record and the app shows you what it hears before the take starts. The recording begins with your first sound, not with the button press, so there is no silence or click at the start. If you don't like the take, cancel it and nothing is saved. KEYBOARD AND DRUM PADS The keyboard shows two octaves at a time and scrolls. It is fully multitouch, so chords and glissandos work. Eight drum pads hold eight different samples for beats. Pitch and length are independent: higher notes last as long as lower ones. If you prefer the classic tape sound, where higher also means faster, switch it on with one tap. LOOP STATION Tap a loop slot, play something and tap again to close the loop. Every new layer stays in time with the first one. You can also record a loop straight from the microphone. Your loops are still there the next time you open the app. RECORD YOUR SONG One button records everything you play: keyboard, pads and loops. It records what the app outputs, not what the microphone picks up, so the result is clean. Share it via AirDrop, Messages or any other app. PORTRAIT AND LANDSCAPE On iPhone, hold it upright to record and edit samples and turn it sideways to play. On iPad you get pads and keyboard on one screen. No account, no subscription, no tracking. Your recordings stay on your device unless you share them.
Screenshots
Verdict
The clearest difference is in-app purchases: SimpleSampler at none against RasterFX's 1. On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. RasterFX sells 1 one-off in-app purchase. SimpleSampler asks for nothing beyond the download.
| Parameter | RasterFX | SimpleSampler |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 16.4 β better |
| Further details β not scored | ||
| Size | 5 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Chih Han Lin | Max Nowack |
In-app purchases
RasterFX
- RasterFX Pro$3.99
SimpleSampler
No in-app purchases





