InboxToKindle

Early signal

One inbox email delivers every newsletter to your Kindle

Launched 28d ago

Signal

Velocity

What this means

40%Vote pace is below typical for Productivity.

Running at 40% of comparable launches.

+150%Launching in a 150% WoW growing category.

Newsletters had 5 launches this week vs 2 last.

14Founder Conviction Index: 14 — low signal.

Few of the conviction sub-signals (reputation, velocity, buyer-intent, tagline clarity) are firing yet.

Prediction

Top-5 finish probability

today

Projected end-of-day votes

3range 2–4

Trajectory

stable

Vote pace holding steady.

Speed vs peers

0.4×

195 Productivity launches

About

Send to Kindle works for the odd document, but not for a newsletter habit: every sender must be on your approved list, and it holds 15 addresses. InboxToKindle gives you one private address that is already approved. Subscribe with it (Substack, Beehiiv, Ghost, any email newsletter) and each issue lands on your Kindle or Boox as a clean EPUB, without ads or tracking. Free for 3 deliveries a month, no card. Pro is unlimited for $10 a month. Or try the free Substack-to-EPUB converter, no account.

AI Summary

InboxToKindle allows users to receive newsletters directly on their Kindle or Boox by providing a single approved email address for subscriptions. The service offers three free deliveries per month, with a pro option for unlimited deliveries at $10 per month.

Attention & discussion velocity

Performance

Velocity0

Vote pace vs average

Momentum0

Sustained over 6h

Virality0

Spread × engagement

Engagement—

not measured

Signal sources

2 of 6 active

Launch tracking4 readings since we picked it up
AI analysisProductivity
Comment intelligencethread not yet analysed
Outside discussionnot checked — domain is a storefront or shared
Revenue signalsno match on this domain
Editorial scoringbelow the signal threshold for this pass

A source that found nothing is a measurement. A source that has not run is a gap. Neither means the launch lacks the thing.