BTS FX vs iSimpleLoop
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BTS FX
This audio effect plugin offers a versatile multi-effect suite for music production. It features a bitcrusher, distortion, reverb with a freeze function, and a limiter, all controllable within compatible DAWs.
- Bitcrusher with adjustable rate and bit
- Distortion module with various algorithms
- Reverb module with freeze function
- Brick-wall limiter
- Oversampling module (2x, 4x, 8x)
- Stereo/Mode processing
- Parameter randomizer
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BTS FX emerges as a dynamic multi-effect plugin, incorporating a diverse set of modules. Available on as Auv3 audio effect or can be loaded in IAA. App requires compatible Auv3 or IAA host (DAW) to load an effect. Among its Main features are: Pre/Post Moog Ladder Filter Bitcrusher with adjustable Rate and Bit controls Distinctive Distortion Module offering various reshaping algorithms. The plugin boasts a lush Reverb Module with a unique Freeze function , complemented by a Brick-wall Limiter Module and convenient Input/Output Gain adjustments. Additionally the Oversampling module provides 2x, 4x, and 8x factors, featuring both polyphase allpass IIR and FIR versions with latency compensation. Further enhancing its capabilities, BTS includes Stereo/Mode processing and a Parameter Randomiser for added creative exploration. Preset Manager, etc.
iSimpleLoop
Record and layer multiple audio tracks to create songs. Features built-in instruments like guitar, keys, and pads, along with editing tools and effects. Export your creations as audio or MIDI files.
- Multi-track recording
- Built-in guitar, keys, and pads
- Audio and MIDI export
- Song arrangement and editing
- Effects and EQ
- Lyrics and note editor
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iSimpleLoop is a pocket sketchpad for songs. Record a loop, stack takes over it, play the guitar, the keys and the pads on top, keep the lyrics in front of you — and take the result out as audio or MIDI. Everything runs on the device. No account, no subscription, no cloud, no internet connection. LOOPER • Up to 8 tracks. Looped tracks follow the master loop, linear ones run the whole length of the song. • The first take sets the loop length; an overdub stops itself after one lap. • Count-in, metronome, and a per-track input: microphone, the app's instruments, or both. • Latency compensation, so a take lands where you played it. INSTRUMENTS • Guitar: strum and pluck six strings with your fingers, chords of the chosen key, power chords, capo, four tones from nylon to overdrive. • Keys: a polyphonic synth with piano, e-piano, pad, bass and lead, sustain and an octave shift. • Pads: 16 pads, 62 built-in sounds, pitch, filter and decay knobs, reverse. • Sampling from the microphone straight onto a pad, plus import of WAV, MP3, M4A, AIFF and FLAC with a trim screen. ARRANGEMENT AND EDITING • The whole song on one timeline: bar ruler, waveforms, playhead, scrubbing. • Select a fragment and trim, cut, silence, fade, normalise, reverse or nudge it by a beat — or drag it onto another track. • Three-band EQ and pan on every track. EFFECTS • Inserts on each track: compressor, overdrive, chorus and flanger. • Two project-wide send buses: a tempo-synced delay and a reverb. • Live instruments sound with the effect but are recorded dry, so the decision stays reversible. LYRICS • The lyrics live in the project, split into sections, and can sit next to the guitar while you play. NOTE EDITOR • Piano roll for the keys, a drum grid for the pads and six-line tabs for the guitar. • Move, stretch, copy, quantize, change pitch, fret, string and velocity — the track rebuilds from the notes right away, so you hear the change in the mix. • Undo and redo; cancel brings the track back exactly as it was. SLICE • Chop a sample by hits, into equal parts or on the tempo grid, drag the markers, tap a slice to hear it. • Slices land on consecutive pads — optionally together with a notes track that plays them in the original order. CHORDS • Any chord on any of the eight buttons: major, minor, 7, maj7, m7, sus2, sus4, add9, 6, m6, dim, aug. • Playable shapes are found automatically; pick a variant or place your own fingers on the fretboard. HARDWARE • USB audio interfaces: choose the input and the channel to record; other sample rates are converted on the fly. • MIDI keyboards over USB and Bluetooth play the synth and record like the on-screen keys; channel 10 plays the pads. • Foot controllers: MIDI Learn for play, record and stop; keyboard-style page-turner pedals work out of the box. EXPORT • WAV 24-bit, M4A (AAC) and MIDI — a track per instrument, pads on channel 10. • A home screen widget records a sample straight into the library. Landscape on iPhone and iPad. Interface in English, Russian, German and Italian.
Screenshots
Verdict
The clearest difference is price: iSimpleLoop at Free against BTS FX's $9.99. BTS FX's advantage is update cadence (every 2 days vs every 3 days) and ratings volume (3 vs 1). On rating, ads, in-app purchases and device support 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
iSimpleLoop is free to download; BTS FX costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for BTS FX against 5.0 for iSimpleLoop. Both are backed by a comparable volume of ratings — 3 and 1 respectively.
BTS FX ships an update every 2 days, iSimpleLoop every 3 days. The most recent releases landed on October 25, 2026 and October 13, 2026 respectively.
| Parameter | BTS FX | iSimpleLoop |
|---|---|---|
| Price | $9.99 | Free — better |
| Rating | 5.0 (3 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 2 days — better | Every 3 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 25 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Dmytro Kiro | Artem Kolchin |
Customer experience
BTS FX
iSimpleLoop
In-app purchases
BTS FX
No in-app purchases
iSimpleLoop
No in-app purchases







