AudioEditorKit
Free in-browser MP3/WAV tools. Nothing uploaded, no account.
What is AudioEditorKit?
A set of small free audio tools that run entirely in your browser: MP3 bitrate converter, compress MP3, WAV to MP3, MP3 to WAV, M4A to MP3, fade in/out, trim, merge, change volume, speed or pitch, stereo to mono. Files stay on your device. Nothing is uploaded and no account is needed. Supports MP3 and WAV (M4A input for one tool), up to 30 MiB and 10 minutes per file. Free, no paid tier.
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FounderPlaybooks.
What other founders did to grow.
2722 dispatches from hundreds of founders, pulled from the week's best podcasts.
I posted this thread on how I built Gravl… I shared kind of the technical specs around it. It got over a couple hundred likes within the first couple hours and over 300,000 impressions. Yeah, we got our first couple thousand users.
A single Reddit build-story thread can net 300K impressions and your first thousand users
The first thousands of users came from a single Reddit thread describing how the app was built, aimed at developers who happened to also lift. Sharing the technical build story (not a sales pitch) earned 300K impressions and the feedback loop that confirmed product-market fit.
We've been running on Instagram and Facebook and it's been pretty productive to the point where it's almost net spend zero — we spend a dollar in advertising and then we make a dollar in revenue. With a 30-day trial you end up with up to a 90-day float — that's the key.
Net-zero ad spend — $1 in, $1 out, every dollar buys a user
Alex's bar for paid acquisition isn't profit, it's break-even on first-cycle revenue. At net-zero ROAS, every dollar of capital eventually returns as a dollar plus a paying user who'll renew — exactly the math that justifies raising and deploying venture money on ads.
There's a play for whatever you're stuck on.
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