Soundpost: Sound Capsules

Capture how a moment actually sounds — keep it as a mood-tinted waveform card, and seal it to open again on a future day. Private, offline, and honest by design.

Some moments you don't want to photograph — you want to hear them again. The rain on the window. The cafe you loved. A voice you're afraid you'll forget.

Soundpost is an audio-first memory app. Capture up to a minute of how a moment actually sounds, and it becomes a beautiful, mood-tinted waveform card: sound + mood + place + one line. Your gallery of cards is a re-livable record of your life as it sounded — not just how it looked.

And when a moment feels like it belongs to later, you can seal a capsule to resurface on a date you choose: a postcard you send forward to your future self.

• Capture in seconds — tap once, record the sound around you
• Every clip becomes a glanceable, mood-tinted waveform card
• Add a place and a single line of meaning
• Seal a capsule to open on a future date
• Every capsule picks a surprise day to echo back and remind you of today — change or turn it off anytime
• Private and offline-first — no account, your sounds stay on your device
• English, 日本語, 简体中文

Honest by design: the seal is a gentle, on-device seal, not encryption. In this version your capsules live only on your device (no cloud backup yet), and we never charge you to open a memory you've already made.