Amazing Marvin alternative
The customization you like about Marvin. Without the meter running.
Amazing Marvin earned its following by letting people shape task scheduling to fit how they actually think — its "strategies" system is a real, well-built piece of software design, and this page isn't going to pretend otherwise. What Groundkeep offers instead isn't a knockoff of that one feature. It's the same instinct — let the person customize the module, not just fill in fields — applied across tasks, calendar, habits, journal, and finances, running from one file on your own machine, bought once for $59 instead of rented at $12 a month forever.
Credit where it's due
Marvin's strategies are genuinely good. This isn't a knock on them.
If you've used Marvin, you know the strategies engine is the whole point — a way to tell the app the actual rules by which a task should surface, snooze, or reschedule itself, instead of accepting whatever one-size-fits-all logic a task app ships with. For people who've tried and abandoned three other task managers because none of them scheduled things the way their brain works, that customization is worth paying for. The tradeoff is what comes with it: Marvin is a cloud service, your task data lives on Marvin's servers, and the $12/mo doesn't stop as long as you want the app to keep working. That's a completely standard SaaS deal — plenty of people are fine with it. This page is for the ones who aren't.
What Groundkeep does instead
One customizable app, one local file, four kinds of person it's built for
Groundkeep isn't just a task manager with a subscription removed — it's tasks, calendar, habits, journal, finances, and meal planning built as modules in one app, each one you can shape to your own workflow, all stored in a single SQLite file on your machine rather than scattered across someone else's servers. A developer can script against the same local API the app itself uses; a freelancer can track project tasks and invoicing side by side; a parent can run the family calendar and routines together; a business owner can keep finances and process tracking in one place — all without a login screen standing between them and their own data.
Tasks that bend to your rules
Custom priorities, due dates, and time estimates — and actual time worked gets tallied automatically from focus-session logs, not typed in by hand unless you want to override it.
Calendar, habits & routines together
Recurring events with per-occurrence exceptions, plus routines with their own cadence and a streak log — scheduling logic that's yours to configure, not a fixed template.
Finances, journal & notes, not bolted on
One-off entries, recurring bills, and debt tracking sit next to a daily journal and a tagged notes system — the same app, the same file, no second subscription to a budgeting tool.
Automate it yourself
A documented local REST API with live SSE updates — the same interface the app's own UI runs on — so a script, a cron job, or an AI agent can read and write your data directly.
Do the math
$12/month doesn't feel like much, until you multiply it out
Marvin's list price is $12/mo, or roughly $144/year — and that meter keeps running for as long as you use the app. Groundkeep is a single $59 payment, full stop. Here's the same comparison stretched out over time:
| Category | Amazing Marvin | Groundkeep |
|---|---|---|
| Pricing model | $12/month subscription, billed for as long as you use it | $59 once, no recurring charge |
| Cost after 1 year | ~$144 | $59 |
| Cost after 3 years | ~$432 | $59 |
| Cost after 5 years | ~$720 | $59 |
| Where your data lives | Marvin's servers, accessed over the internet | One SQLite file on your own machine |
| Custom scheduling logic | Yes — the strategies engine, Marvin's strongest feature | Yes — configurable behavior across tasks, calendar, habits, and finances |
| Scripting your own automation | Limited to what Marvin's API exposes | Full local REST + SSE API — the same one the app itself runs on |
None of this requires Marvin to be bad at what it does — it isn't. It requires only that you'd rather pay once and keep your own data on your own disk than pay monthly to keep it on someone else's.