DelayCalc BPM

Delay & LFO from any BPM

Only for iPhone

$2.99 · Designed for iPhone. Not verified for macOS.

iPhone

Type a tempo and every note value lines up with its delay time and LFO rate. Reverse ms or Hz back to BPM, get bar & loop lengths, 5/7 tuplets, samples. Tap to copy. DelayCalc BPM turns a tempo into exact delay times and LFO rates in an instant — built for music producers and live engineers. Type in a BPM and every note value lines up with its delay time (ms) and LFO frequency (Hz). No more doing the math by hand or digging through a chart; the number you need is right in front of you. Don't know the tempo? Just tap along to the beat and DelayCalc estimates the BPM for you (tap tempo is a helper, not a precision detector). Already have a time? Work backwards: enter a delay in ms or an LFO rate in Hz and DelayCalc tells you the BPM and the closest note values. "What BPM is this 375 ms pedal?" — answered. Going further out? Odd tuplets (quintuplets and septuplets) are covered for polyrhythmic delays and experimental LFO rates. Need a full bar or a loop? Pick a meter (3/4, 5/4, 5/8, 6/8, 7/8, 9/8 and more) and DelayCalc gives you the length of one bar and of 1 / 2 / 4 / 8-bar loops in ms, seconds, Hz, and samples — for loop LFOs, sequencers, and samplers. Tap any note value to go deeper: seconds, plus sample counts at 44.1, 48, and 96 kHz. Copy any value with one tap straight into your gear or DAW. Great for: - Dialing in delay and LFO settings in your DAW - Setting tempo-synced synths and delay pedals by hand - Working backwards from a ms or Hz value to BPM and note value - Timing loop LFOs, sequencer cycles, and sampler loop lengths - Matching effects to the track at live PA gigs and rehearsals - Pulling values from a track's tempo while DJing Features: - Instant ms / Hz from any BPM - 15 note values, including triplets, dotted notes, and 32nds (`1/1` to `1/32D`) - Odd tuplets: quintuplets and septuplets (5:4 / 7:4 ratios, Advanced) - Reverse lookup: ms → BPM and Hz → BPM, with closest note candidates - Meter & Loop Length: bar and 1 / 2 / 4 / 8-bar loops in ms / seconds / Hz / samples - One-tap copy for any value - Saved Setups: store a setup and restore it later (up to 20, on-device) - Tap tempo to estimate BPM (helper feature) - A clear warning when your taps are uneven - Sample counts at 44.1 / 48 / 96 kHz for every note - Dark, high-contrast UI that stays readable on a dim stage Simple and honest: - Values use your project tempo (quarter-note BPM) — the same numbers as your DAW - A fast manual calculator — no mic analysis, no DAW link, no setup - Saved setups stay on your device (nothing sent to the cloud) - Core calculations work offline (a connection is only needed to open the Privacy Policy) - No account - No ads - No subscription — pay once Supported note values: `1/1`, `1/2`, `1/2D`, `1/4`, `1/4T`, `1/4D`, `1/8`, `1/8T`, `1/8D`, `1/16`, `1/16T`, `1/16D`, `1/32`, `1/32T`, `1/32D`

Ratings & Reviews

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Version 1.1.1 — usability improvements - Cleaner, more compact layout — more delay / Hz values visible at a glance - Tap Tempo is now collapsible (expand only when you need it); your BPM stays put - The Reverse number field now has a Done button to dismiss the keyboard quickly - Small display and interaction refinements Still offline, still no account, still a one-time purchase. Added in 1.1.0: Reverse lookup, Meter & Loop Length, odd tuplets (5:4 / 7:4), one-tap copy, Saved Setups, and the Delay / Reverse / Loop mode switch.

Version 1.1.1

The developer, KENTA OSAWA, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

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    Accessibility

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    Information

    Provider
    • KENTA OSAWA
    Size
    • 19.2 MB
    Category
    • Music
    Compatibility
    Requires iOS 15.0 or later.
    • iPhone
      Requires iOS 15.0 or later.
    • iPod touch
      Requires iOS 15.0 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    Copyright
    • © 2026 K's App
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.

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