The Weekly Buildout
I spent this week building something I should have built weeks ago: an automated email drip system for my app Listaza.
Nothing fancy, just a series of emails that fire based on where users are in their 7-day trial.
Welcome email, reminders, soft upsells. The kind of thing that runs itself so I don't have to track who signed up when or remember to send follow-ups manually.
THE WEEKLY UPGRADE
🛠️
Source: Nano Banana Pro 2/ Joe Builds Systems
I needed to get ahead of churn bleeding on Listaza and get more trial users converting to paid plans. Manual follow-ups weren't happening consistently (I DO have a life after all…), and I was losing people who might have upgraded with a simple reminder.
The system I built sends four emails: a welcome when someone signs up, a 3-day reminder (with different versions depending on whether they've created a listing), a 24-hour warning with a soft upsell, and a post-trial email with some FOMO language if they don't upgrade.
I used n8n to handle the workflows. Everything seemed straightforward until I realized I had no way to track whether users had already used their full trial week. Without that flag, the whole system would misfire.
I had to build a separate daily workflow that checks each user's trial end date and flips their "trial used" indicator to TRUE when they hit that mark. Not elegant, but it works.
The key lesson: map every possible user path before you start building. My 3-day email needed two versions based on user behavior. I almost missed that branch entirely. Also, balance your email frequency. Daily emails might seem helpful, but they'll annoy users fast.
If you're building something similar, drop this into Claude or ChatGPT before you write a single line of code:
I'm building [describe your product or feature in one sentence].
The user starts at [describe the entry point, e.g. "signing up for a free trial"].
The goal is [describe the desired outcome, e.g. "converting to a paid plan"].
Map every possible path a user could take from start to finish.
Include happy paths, drop-off points, edge cases, and any moments
where user behavior should trigger a different response.
For each branch, tell me what action or message makes sense at that point.
Output this as a simple numbered list I can use to plan my build.Paste your real details in the brackets and you'll have a complete decision map in about 30 seconds. It would have saved me a full day of backtracking.