Comparison

Analog Stone 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

Analog Stone

This app emulates a classic 1979 four-stage analog phaser pedal, bringing its iconic psychedelic sound to iOS. It offers a focused, hardware-like experience with an optional circuit to reduce harshness for experimental sound design.

Highlights
  • Classic 1979 phaser emulation
  • AUv3 plugin support
  • Analog modeling engine
  • Add-on circuit for reduced harshness
  • Manual and external rate modulation
  • Supports 44.1, 48, 96 kHz sampling rates
Features
Read full description

Analog Stone is a focused AUv3 recreation of a legendary 1979 four-stage analog phaser. It brings the character and simplicity of the original pedal to iOS, powered by the same analog modeling engine as RealPhase. Where RealPhase takes the rackmount approach with its 50+ parameters (which can be more than some users need), Analog Stone does one thing beautifully: delivering that iconic, sweeping, psychedelic color with the raw immediacy of physical hardware. The plugin includes an add-on circuit that reduces the harshness and other non-musical artifacts that can emerge at high modulation rates (in free-running mode only). This makes the effect useful even in experimental settings such as glitch effects, with more possibilities to explore when modulating the rate parameter either manually or via external means. PLEASE NOTE: • An AUv3-compatible host is required to use this app • Supported sampling rates: 44.1, 48, 96 kHz • Host tracks must be at least CD-quality (44.1 kHz). Note that some virtual instruments, such as GarageBand’s Smart Instruments, operate downsampled at 22.05 kHz and are unsupported

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

Analog Stone1 screens
Bent Spool4 screens

Verdict

The call

The clearest difference is price: Bent Spool at Free against Analog Stone's $5.99. Bent Spool also leads on update cadence (daily vs every 2 days). Analog Stone's advantage is in-app purchases (none vs 1). On rating, ratings volume, 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

Bent Spool is free to download; Analog Stone costs $5.99 up front. Bent Spool sells 1 one-off in-app purchase. Analog Stone asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Analog Stone against 5.0 for Bent Spool. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

UpkeepUpdate frequency

Analog Stone ships an update every 2 days, Bent Spool daily. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

Scorecard4 real differences · 5 level
Analog Stone versus Bent Spool: the parameters behind the verdict, then further details
ParameterAnalog StoneBent Spool
Price$5.99Free — better
Rating5.0 (2 ratings)5.0 (5 ratings)
Number of ratings25 — better
Update frequencyEvery 2 daysDaily — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.4 — better17.0
Further details — not scored
Size3 MB23 MB
Age rating4+4+
DeveloperquantovoxPlastic Factory LLC

In-app purchases

None

Analog Stone

No in-app purchases

1 purchases

Bent Spool

One-time1
  • Bent Spool Unlock$9.99

Questions

Is Analog Stone free?
Analog Stone costs $5.99, with no in-app purchases.
Is Bent Spool free?
Bent Spool is free to download, with in-app purchases available.
Which has better reviews, Analog Stone or Bent Spool?
Analog Stone and Bent Spool are both rated 5.0 out of 5 on the App Store, from 2 and 5 ratings respectively.
Do Analog Stone or Bent Spool have ads?
Neither Analog Stone nor Bent Spool shows ads.
Which is updated more often, Analog Stone or Bent Spool?
Analog Stone ships an update every 2 days, and Bent Spool daily. Most recently, Analog Stone was updated on October 30, 2026 and Bent Spool on October 24, 2026.

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