Comparison

Aether Learn vs Bent Spool

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

Head to head
About

Aether Learn

Features
Read full description

Aether Learn teaches you how sound and synthesizers actually work, one hands-on lesson at a time. No jargon, no prerequisites. Every concept comes with a real synth engine you play with your finger, so you hear the idea the moment you read it. Start from the very beginning: what sound is, how frequency becomes pitch, and why a wave's shape decides its character. Then build up through the tools real producers use every day. WHAT YOU LEARN - Sound and frequency: vibration, pitch, amplitude, and the difference between loudness you measure and loudness you hear - Waveforms and harmonics: watch a bright wave get built from pure sine waves, one at a time, until it forms a full saw - Subtractive synthesis: shape tone with a low-pass filter, resonance, and the classic filter sweep - Envelopes: attack, hold, decay, sustain, release, and delay, shaping how a note lives over time - Modulation: LFOs, vibrato, tremolo, and the rhythmic filter wobble at the heart of bass music HOW IT WORKS Each lesson has three steps. Learn the idea in plain language, watch a short demo that moves the controls for you, then play with a real, audio-reactive instrument built into the app. You see the waveform, the harmonics, the filter curve, and the envelope respond in real time as you turn the knobs. Built for curiosity. Whether you have never touched a synth or you want to finally understand the gear you already own, Aether Learn gets you from zero to making sounds you understand. Best suited for absolute beginners who want solid foundations to carry into any DAW or software synthesizer when they start producing music.

About

Bent Spool

This music app offers creative audio effects for live performance or use within other music apps. Explore rhythmic tremolo, pitched repeats, and looping fragments of your audio. It includes built-in overdrive and tape effects for unique sound shaping.

Highlights
  • Rhythmic tremolo effects
  • Pitched repeat sequences
  • Overlapping audio loops
  • Built-in overdrive and fuzz
  • Vintage tape effects
  • Standalone and AUv3 host support
Features
Read full description

Bent Spool is a creative effect that can transform simple musical parts into unexpected rhythms and melodies, played live or as an effect in your favorite host app. Shape a tremolo pulse, turn a note into a run of pitched repeats, or build a moving layer from fragments of what you just played. Drive the input with built-in overdrive or fuzz, add a core effect, then finally layer in vintage analog tape effects. THREE MODES TREM: a pulsing volume effect, from a rounded sine through triangle and sawtooth to a hard square gate. Syncs to your host's tempo or runs free. REPEAT: up to 64 pitched copies with their own decay and feedback, across five pitch stations from two octaves down to two octaves up. LOOPS: up to six overlapping fragments of your recent audio, spread across pitch, direction, read position and the stereo field. CHARACTER CHAOS adds movement that suits each mode: octave jumps in REPEAT, held or stalled pulses in TREM, wandering reversals and pitch drift in LOOPS. WEAR adds tape wear, magnetic saturation and digital crush after the active mode. At the input, OD is a softer clip; FUZZ is a harder distortion that sputters as it decays. PRESETS 48 factory presets: 10 TREM, 15 REPEAT, 15 LOOPS and an 8-preset Fuzz Tremolo pack. Unlock to save your own. FREE TO TRY TREM plays in full on the OD voice with ten presets. No time limit, no interruptions. A single $9.99 in-app purchase unlocks REPEAT, LOOPS, FUZZ, the rest of the presets and preset saving. No subscription. Runs as a standalone app or as an AUv3 effect in AUM, Loopy Pro and other AUv3 hosts, on iPhone and iPad.

Screenshots

Aether Learn4 screens
Bent Spool4 screens

Verdict

The call

The clearest difference is price: Bent Spool at Free against Aether Learn's $2.99. Bent Spool also leads on update cadence (daily vs every 4 weeks). Aether Learn's advantage is in-app purchases (none vs 1). On 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

CostPrice · In-app purchases · Ads · Monetization

Bent Spool is free to download; Aether Learn costs $2.99 up front. Bent Spool sells 1 one-off in-app purchase. Aether Learn asks for nothing beyond the download.

UpkeepUpdate frequency

Aether Learn ships an update every 4 weeks, Bent Spool daily. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 6 level
Aether Learn versus Bent Spool: the parameters behind the verdict, then further details
ParameterAether LearnBent Spool
Price$2.99Free — better
Rating—5.0 (5 ratings) — better
Number of ratings—5 — better
Update frequencyEvery 4 weeksDaily — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.017.0
Further details — not scored
Size3 MB23 MB
Age rating4+4+
DeveloperDiego PoncianoPlastic Factory LLC

In-app purchases

None

Aether Learn

No in-app purchases

1 purchases

Bent Spool

One-time1
  • Bent Spool Unlock$9.99

Questions

Is Aether Learn free?
Aether Learn costs $2.99, with no in-app purchases.
Is Bent Spool free?
Bent Spool is free to download, with in-app purchases available.
Do Aether Learn or Bent Spool have ads?
Neither Aether Learn nor Bent Spool shows ads.
Which is updated more often, Aether Learn or Bent Spool?
Aether Learn ships an update every 4 weeks, and Bent Spool daily. Most recently, Aether Learn was updated on October 20, 2026 and Bent Spool on October 24, 2026.

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