For coaches who turn teaching into action
Turn your teaching into a challenge readers can finish.
Call of Challenge gives coaches a private path for one reader action: publish the call, collect one final proof, and unlock the reward. Readers join with one email. No challenger account.
Invite-only while the platform grows. Applications are read by a human.
The mechanism
From a teaching issue to a completed challenge.
- 01
Publish the call
Write one related action, define what done looks like, and choose the reward. Put the public opt-in link in the challenge issue.
- 02
Send the private path
A reader enters with one email. The instructions and a private proof link arrive in their inbox. No account or password.
- 03
Unlock on final proof
The reader submits final proof once. The platform checks the required format, then unlocks the promised reward immediately.
Built for follow-through
The work stays in the world. The record stays clear.
One email
is enough to opt in and receive the private challenge path. No signup wall follows.
One final proof
is submitted once and preserved exactly as the reader gave it. No edits, replacements, or second attempts.
No account
means readers follow the challenge through a private link, without creating a profile or dashboard.
House rules
You define the challenge. The platform keeps the record.
The final proof is locked
Once submitted, proof cannot be edited, replaced, reopened, or submitted twice.
Email, not an account
Readers never create profiles or dashboards. Their private links carry the flow.
You set the standard
You choose the action, proof format, and reward. The platform does not invent, improve, classify, or judge the challenge.
The reward unlocks on proof
When the final submission matches the required format, the promised reward becomes available immediately.
A reader’s email is used only to deliver the challenge, receive proof, and send the reward. Accepting your challenge does not subscribe them to other emails.
Fair questions
Before you issue the call.
Does every newsletter issue need a challenge?
No. The Challenge Newsletter uses a two-issue rhythm: one issue teaches, and the next offers a related challenge. The call earns its place by turning that teaching into action.
What can I ask readers to submit as proof?
The platform accepts written proof, an HTTP or HTTPS link, or both. Readers never upload files, and the platform never fetches or previews linked content.
Does the platform decide whether the proof is good?
No. It checks the format you asked for, not the sincerity or quality of the work. You own the standard and see the final record.
How much can I run on the free plan?
Up to three open challenges, 500 challengers per challenge, and an automatic close time within 30 days. Creator accounts remain invitation-only during the MVP.
Embrace the Challenge
Teach something useful. Then give the reader a way to use it.
Tell us about your newsletter, your method, and the first challenge you would run. Invitations go out as seats open; applications are read by a human.
Already invited? Sign in
Learn the method
Build the challenge before you run the flow.
Letter of Challenge shows coaches how to turn a teaching issue into a clear Call of Challenge, then practise the two-issue Challenge Newsletter rhythm.