zero friction

Start recording in a
fraction of a second

Ideas are fleeting, so we offer plenty of ways to start recording immediately, no matter where you are – walking, driving, sleeping or doing sports.

Lock screen widget

The universal control. Just grab your phone, tap once and start speaking.

Apple Watch Complication

Always one tap away, and there's no unlocking. Great for driving safely.

Shortcuts & Action Button

Create a Shortcut, and start recording with Action Button or by talking to Siri.

capture and go

Capture now, process later

Capture your thoughts in a second. By default, all memos are sent to your email so you can decide what to do with them later.

import audio

Transcribe any audio file

Already have recordings? Import audio files from your phone, computer, or any app and get the same accurate transcriptions and AI summaries.

Supports MP3, M4A, WAV, AAC, and FLAC files up to 100 MB

Estim (electro-stimulation) WAV files are specialized uncompressed audio files designed to control electro-stimulator devices to produce various physical sensations. Unlike standard music files, these contain specific frequency patterns—often called "stereostim"—that a power box converts into electrical pulses. Understanding Estim Audio

4. File Formats and Technical Specifications

While any .wav file can technically play through an e-stim box, optimized files adhere to strict standards:

WAV files are uncompressed. The signal coming out of the player is exactly the signal the designer created. For safety and smoothness, the WAV format remains the gold standard for high-end estim content.

• Stuttering sensations: Because the bitrate fluctuates.
• Unwanted sharp spikes: As the algorithm misinterprets silence.
• Flat or "muddy" feelings: Loss of dynamic range.

: To get the most out of these files, using a dedicated mains power supply (like the one for the E-Stim Systems 2B ) is highly recommended. It offers roughly 30% more power

Audio Stim Library at ElectraStim: Provides a foundational explanation of how audio files control stimulators to create complex rhythms and sensations beyond standard repeating patterns.

The Experience

1. The Sensation: Unlike standard "Estim" modes (which often feel like rhythmic tapping or buzzing), audio files offer a spectrum of textures. A well-produced file can feel like a scratching sensation, a deep thumping massage, or sharp, staccato flicks.

How to work with WAV files

Using an MP3 for estim can result in:

pricing

Unbeatable price,
unmatched features

Get more features for less than a third of the price. Here's how Whisper Memos stacks up.

Annual plan prices fetched from official websites in February 2026.

about the developer

Made by an indie developer

My name is Vojtech Rinik. I've been creating apps since 2009, and previously spent 4 years building Reflect, a note-taking app.

Now I work on Whisper Memos full time and personally handle all the support.

Follow me on X.com or reach out via .