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How this behaves: what it will and will not do

A checklist of the usual ways software manipulates people, what this tool does instead, and how to check each one yourself.

Most of the ways software gets people to do things are documented, named and well understood. This page goes through the common ones and says, for each, what this tool does instead, and how you can check that for yourself in about ten seconds.

It is deliberately not a statement of values. Values are unfalsifiable and every company claims good ones. What follows is a description of specific mechanics, each with a test you can run, plus a list of the places I fall short.

The pattern names come from deceptivepatterns.org, the public taxonomy maintained by the researcher who named this category of design. Being graded against someone else’s list is worth more than inventing a flattering one.

The checklist

How this is funded

This tool is free because two optional things pay for it: a Wealthsimple referral link, and a tip jar. Both are clearly marked, both are entirely skippable, and neither one changes a single number the calculator produces.

Community mode removes both. It is a switch in the footer that strips every referral link and every tip prompt out of the tool, including from the What’s New panel, and gives you a link you can share that opens the same way for whoever clicks it. It exists because a calculator posted into a strict subreddit or handed to a client should not be carrying anything that earns me money.

That is the part worth judging me on. Community mode is not a setting I get anything from. It is the version of this tool that makes me nothing at all, and it is one click away at all times. As of August 2026 it also stops the Reddit advertising pixel from loading, so a community link no longer reports the visit to an ad platform.

If the funding ever changes

I am not going to promise this will be free forever, because nobody can honestly promise that and I would rather not pretend. What I will commit to is how any change would happen:

Where I fall short

The things on this page are only worth reading if I also tell you where the edges are.

Found something that breaks this?

Then I want to know, and I would rather hear it from you than read it in a comment thread. There is a feedback link in the calculator’s footer. Anything I get wrong here gets fixed and listed above.

This page is versioned. It describes how the tool behaves as of version 1.0, August 27, 2026. If any of it changes, the change and the reason for it get written here.

See where the numbers come from →
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