Get out of a commitment gracefully

I agreed to {{commitment}} and cannot do it. Reason: {{reason}}

Write the message. Say it early, own the change without a paragraph of
justification, and offer whatever is genuinely useful — a later date, a smaller
version, or someone else — but only if it is real.

Do not apologise three times, and do not blame anyone else.

What to fill in

{{commitment}}

What you agreed to — e.g. reviewing a friend's app before Friday

{{reason}}

Why you can't — e.g. App Store submission ate the week