Zup
Turn photos and ideas into posts that sound like you
AI & Machine Learning·Social·Productivity
What is Zup?
Zup is a free native iPhone app that turns photos and ideas into editable social posts. Start with a photo or a thought, generate a caption, adjust its tone and length, and review it in a live platform preview before sharing. You can customize emojis and hashtags, proofread your writing, and schedule reviewed posts to X or LinkedIn.
Built by a solo, self-funded maker, Zup helps creators and small business owners find words for the moments they want to share while keeping the final say over every post. All features are free, with an optional one-time tip.
Available on the App Store:
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FounderPlaybooks.
What other founders did to grow.
2722 dispatches from hundreds of founders, pulled from the week's best podcasts.
Before our mix of yearly and monthly subscriptions was 56 yearly and after changing that blinkist style paywall to show the yearly by default and adding the quick subscribe our yearly subscriptions are now 76 versus 56 — and we have better long-term value for yearly subscriptions.
Default-Annual Paywall Moved Annual Mix From 56% to 76% in Weeks
Two simultaneous changes — defaulting the paywall to the annual plan with a 'see all plans' link, plus a quick-subscribe card in main tabs — shifted None to Run's subscription mix from 56% annual to 76% annual within weeks. Yearly subscribers have better LTV than monthly despite half the per-cycle price, because retention is higher. Guiding users toward annual is both better for the business and better for the user.
We see almost a 5x higher trial to paid conversion rate on mobile than on other channels sometimes because of very obvious reasons like this credit card is already attached and there is a frictionless experience people trust providers like Apple Google Amazon to essentially manage their subscription.
Mobile Gets 5x Higher Trial-to-Paid Than Web — Because the Credit Card Is Already There
Even at Microsoft's scale, the mobile app store drives dramatically higher conversion than web or direct channels. The friction of entering payment details on web kills trials; on mobile the card is stored and trust is already established. This frictionless payment flow is itself a growth lever — not just a convenience.
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