Comparison

Stereo Modulator vs PadLoop

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

Head to head
About

Stereo Modulator

This audio effect plugin transforms mono sound into stereo, adding width and depth. It uses micro-delays to create a natural sense of space, with optional LFO modulation for a Leslie speaker-like effect without pitch shifting. Ideal for creating separation in mixes, especially for guitars and vocals.

Highlights
  • Mono to stereo conversion
  • Adjustable stereo width
  • Optional LFO modulation
  • Micro-delay de-correlators
  • Creates natural spatial depth
  • No pitch shifting or echo
Features
Read full description

Stereo Modulator is an AU3 effect that converts mono sound into stereo, with an adjustable width and optional LFO modulation. It works by using a bank of randomized stereo de-correlators that apply micro-delays to introduce random differences between the spectrums of the left and right audio channels. In its output we hear a natural sense of space that is not present in mono recordings. It's similar to the sound space one gets from using a stereo reverb plugin except that it is tight and clear, without echo. It can operate either as a static effect or it can be gently modulated by a low-frequency oscillator. The modulation is akin to the sound of a Leslie speaker, except that it doesn't do any pitch shifting, so the output remains focused and tuning is not compromised. This effect is especially useful for mixing overdriven electric guitar sounds together with vocals. Using Stereo Modulator on the guitars, we can push them out to the sides, creating a space in the centre for the vocal to cut through, without needing to reduce the volume of the guitars. NOTE: Stereo Modulator is an AU3 plugin only, not a standalone app. To use it, you will need an audio unit host app such as Garageband or Audiobus.

About

PadLoop

Features
Read full description

Sixteen pads, a track looper and a sampler: PadLoop turns your phone into a real instrument for making beats with your fingers - no musical training needed. Try everything free for 7 days. After that PadLoop stays free with 2 banks, 2 looper tracks and one project, or you unlock everything with a single one-time purchase. No subscription. NEW • Ready beats: 24 complete grooves (Trap soul, Afrobeats, Deep house, UK drill, Funk, Lo-fi...), each with its own bank, tempo and swing, drums and music already recorded. One tap and you play over them • Optional plugins: 6 sound kits (Reggaeton, Afro & Amapiano, Jungle & DnB, Phonk, Drum Machines, Percussion) and 4 instruments with real recorded notes (grand piano, marimba & vibraphone, strings, winds) • Split a song: the Stem split plugin separates a track into vocals, drums, bass and the rest, right on your phone, no internet needed. Then put the parts on your pads (needs 3 GB of RAM or more) • Pedals: MIDI pedals run the looper hands-free • More precise mic recording: the delay is stored separately for speaker, headphones and Bluetooth • On first launch, if you like, an example to listen to or a step-by-step guide PLAY • 8 sound banks (128 pads): drums, basses, synths, vocals - all replaceable • Touch dynamics: hard at the bottom, soft at the top, like real pads • Keyboard: play any sound in a scale with no wrong notes, chords included • Note repeat with Latch, an arpeggiator, 16 Levels (the same sound at sixteen velocities), hold-down effects (filter, echo, reverb, lo-fi...) • Shape every pad: pitch, reverse, envelope, filter, echo, lo-fi RECORD LOOPS • Hit REC and play: the loop records itself and keeps going, layer after layer • Up to 16 synced tracks: name them and drag them into your own order, without stopping the loop • Time-stretch: a loop follows the project BPM without changing pitch • Quantization with a selectable grid (8ths, 16ths, triplets, 1/32) or off - and you can change it afterwards • Step sequencer with per-cell hit strength: accents and ghost notes • Mute in time, per-layer undo, loop doubling, swing SAMPLE ANYTHING • Record from the mic, import audio files, take the sound from a video, or resample the app itself • Trim with handles, split on hits automatically or chop by hand; clean up steady background noise • Sound library with 558 ready-made sounds and 29 pre-built banks SING AND SHARE • Record your voice straight onto a track, in time with the beat • Save your own banks and share them with friends as a file • Record your live performance, effects and mistakes included • Export to MP3/WAV or as separate tracks, at the same full level you hear in the app BUILT FOR REAL PLAYING • A "?" on the main screens explains every button, with the full guide one tap away • Two calibrations, for taps and for the mic, so what you record lands where you played it • MIDI controllers and keyboards, USB and Bluetooth, with MIDI learn • Autosave and one-file project backup HONEST • No ads. Ever. For anyone. • No subscriptions: a 7-day trial with everything unlocked, plugins included, then playing stays free forever (2 banks full of sounds, 2 looper tracks with the microphone too, one project) • A single one-time purchase unlocks everything: the full sampler, all 8 banks, 16 tracks, 558 sounds, 29 ready-made banks, 24 Ready beats, all plugins, export, performance recording, unlimited projects • Everything you create stays yours and keeps playing, no matter what Make your first beat in thirty seconds. The rest follows.

Screenshots

Stereo Modulator3 screens
PadLoop4 screens

Verdict

The call

The clearest difference is price: PadLoop at Free against Stereo Modulator's $2.99. PadLoop also leads on update cadence (weekly vs every 3 months). Stereo Modulator's advantage is in-app purchases (none vs 2) and iOS requirement (10.0 vs 15.0). On ads 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

CostPrice · In-app purchases · Ads · Monetization

PadLoop is free to download; Stereo Modulator costs $2.99 up front. PadLoop sells 2 one-off in-app purchases. Stereo Modulator asks for nothing beyond the download.

UpkeepUpdate frequency

Stereo Modulator ships an update every 3 months, PadLoop weekly. The most recent releases landed on November 2, 2026 and November 6, 2026 respectively.

Scorecard4 real differences · 6 level
Stereo Modulator versus PadLoop: the parameters behind the verdict, then further details
ParameterStereo ModulatorPadLoop
Price$2.99Free — better
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.0
Further details — not scored
Size2 MB138 MB
Age rating4+4+
DeveloperBlue Mangoo Consulting Company LimitedPOSITIVE VIBRATION, SOCIEDAD LIMITADA.

In-app purchases

None

Stereo Modulator

No in-app purchases

2 purchases

PadLoop

One-time2
  • 7-Day Free TrialFree
  • Full Unlock$9.99

Questions

Is Stereo Modulator free?
Stereo Modulator costs $2.99, with no in-app purchases.
Is PadLoop free?
PadLoop is free to download, with in-app purchases available.
Do Stereo Modulator or PadLoop have ads?
Neither Stereo Modulator nor PadLoop shows ads.
Which is updated more often, Stereo Modulator or PadLoop?
Stereo Modulator ships an update every 3 months, and PadLoop weekly. Most recently, Stereo Modulator was updated on November 2, 2026 and PadLoop on November 6, 2026.

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