A personal CRM is what happens when you point note-taking at people instead of ideas. The name is borrowed from sales software and it is unhelpful, because it makes a fairly human practice sound like pipeline management. The underlying thing is old: knowing that someone's mother was ill, that they were about to move house, that they recommended a book you never read.
Most people already do a version of this badly, in memory. The question is whether writing it down helps or turns something warm into an accounting exercise.
Why memory is not enough
Robin Dunbar's much-cited estimate puts the number of stable social relationships a person can maintain at roughly 150, with tighter inner layers of about five and fifteen. Whatever the exact figure, the shape is right: close relationships are maintained effortlessly, and the outer layers decay without support.
The outer layers are where a personal CRM earns its keep. You are not going to forget your best friend's situation. You will absolutely forget that a colleague you see twice a year mentioned they were doing a part-time degree, and asking about it is the entire difference between a real relationship and a professional acquaintance.
The failure is not caring less. It is that details you heard once, months ago, without writing down, are gone — see the forgetting curve.
What is actually worth recording
Keep this short. The systems that survive record very little.
- Context you would be embarrassed to forget. Partner's name, kids, where they live, what they do.
- Ongoing situations. A move, a job search, a family illness, a project they are excited about. These are the ones that make a follow-up land.
- Things they gave you. Recommendations, introductions, advice. Both because you should follow up and because you owe them.
- How you met, and when. Surprisingly hard to reconstruct after a few years.
- What you said you would do. The commitment you made in conversation and have not kept.
What is not worth recording: anything you would not be comfortable with them reading. That is a reliable test, and it does most of the ethical work on its own.
Why the dedicated apps get abandoned
There are many purpose-built personal CRM apps. Monica is the well-known open-source one; there are a dozen commercial equivalents. They are usually well made, and they usually end up empty. Three reasons, in order of importance:
Capture friction. The moment you learn something is mid-conversation or thirty seconds after it ends, walking to a car. Opening a dedicated app, finding the contact and filling a field will not happen. Anything that does not work in one gesture from a lock screen collects nothing. See how to capture a note.
The reminder model backfires. Most of these apps offer "stay in touch every 90 days" nudges. Contacting someone because software told you to produces a stilted message, and people can tell. A prompt to remember something is useful; a prompt to perform intimacy is not.
Fields without a purpose. A schema with birthday, spouse, hobbies and last-contacted invites you to fill it in, which is data entry rather than relationship. Empty fields then read as failure.
The version that survives is almost always plainer: one note per person, in the notes app you already use, appended to over years. No structure, no schedule, no dashboard.
The plain-text version that works
- One note per person, titled with their name so search finds it instantly.
- Append, dated, at the top.
2026-03-11 — mentioned she is moving to Lisbon in autumn.One line, no formatting. - Capture into your normal inbox first, and move it to the person's note later. Nothing that requires the right app at the wrong moment will happen. See the note inbox.
- Read the note before you see them. Thirty seconds beforehand, which is the only "review" this system needs and the entire payoff.
- Delete the trivia occasionally. The note should stay readable in a minute.
That is it. It sits comfortably inside a normal PKM workflow and needs no dedicated tool.
The ethical line
This is the part that deserves plain speaking, because the practice can drift somewhere unpleasant.
The purpose is to be a better friend, not to manage assets. If the notes are optimising who is worth your time, you have built something else, and the people involved would recognise it immediately.
Record what they told you, not what you inferred. A note saying "mentioned money is tight" is a fact they shared. A note assessing their finances is surveillance.
Do not record third-party information — things about someone told to you in confidence by another person. It is not yours to file.
Keep it private and encrypted. These notes are more sensitive than almost anything else you write. See encrypted notes and the best private notes app.
The comfortable test: would this note be fine if they read it? If not, do not write it. Not because you would get caught, but because a note you would hide is a note you should not be keeping about a friend.
The honest case for it
There is a common objection that writing this down makes relationships transactional. It is worth taking seriously, and it is mostly backwards. Nobody objects to remembering someone's birthday with a calendar. Remembering that a friend's father was in hospital is the same act, and forgetting it is not more authentic — it is just forgetting.
The notes are a memory aid for people you already care about. They do not create warmth and they cannot fake it. What they can do is stop the slow decay of the outer circle, which otherwise happens by default, one forgotten detail at a time.
More in how to name notes, external memory, and personal knowledge management.