Sudoku A Day
Sudoku a Day — Free Daily Puzzles & Printable PDFs
About
Sudoku a Day — Free Daily Puzzles & Printable PDFs
Play online, print at home, or solve on iPhone. One puzzle a day — no ads, no rush, just logic.
Get the iPhone App
We craft a fresh puzzle every morning so you can build a calming routine that keeps your brain sharp.
Add Sudoku a Day to your daily routine to relax your mind while giving it a workout!
As the name suggests, Sudoku a Day is an iPhone app that offers a new Sudoku puzzle to solve every day. It's an excellent daily brain exercise that won't take up too much of your time!
Note that you can select your difficulty level in the app's settings: easy, medium, hard, expert, and master.
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FounderPlaybooks.
What other founders did to grow.
2722 dispatches from hundreds of founders, pulled from the week's best podcasts.
When we try to communicate a nuanced message with three points, the first point is heard and the other two aren't. If you change the game on someone they're upset the cheese has moved. The fact that you did it to the 95th percentile versus the 55th percentile is likely lost because they're upset.
Communicate a Change Once Clearly — Nuanced Messaging After Point One Is Ignored
V1 Sports learned that elaborate multi-point explanations around disruptive changes are wasted effort. When moving users from free to paid, customers focus entirely on the change — not the justification. Alex Prasad now makes the core message clear once and doesn't over-engineer the explanation, because over-massaging communication won't soften a decision that changes the rules.
that point of purchase is probably the most engaged your customer is ever going to be... we get pretty decent conversion rates in that 5-ish% and all of a sudden you know I have zero incremental customer acquisition costs and now I'm driving something like a hundred to $200 in lifetime value from just one pop-up
Strike while the card is out: post-purchase upsells convert at 5%
Michael runs a simple upsell immediately after a user subscribes, when the credit card is already out and intent is at its peak. At Conde Nast, a single post-purchase pop-up for a business membership tier converts at around 5% with zero additional CAC, generating $100-200 in incremental LTV per subscriber. The moment of purchase is the single highest-leverage upsell window; most apps never use it.
There's a play for whatever you're stuck on.
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