Best way to capture user age

Has anyone tried tracking user age before? I have a case now where it’s relevant to capture and update their current age, and I’m wondering whether to do something clever like below, or just to brute force it and update their “current age” user property every day or session.

Age User Property
- Set both their birthdate and age (at time of submission) as user properties
- Configure derived property in Amplitude for current age (i.e. today - birthday)

Find more posts tagged with

Accepted answers

Saish Redkar

Hey timothy-permutable

I haven’t tried this before, but I would go with your derived property solution mainly for the ease and convenience involved.
One caveat which might occur in this approach - if we are trying to analyze a user’s activity from a year ago, then the current age derived property associated with that event will reflect the users current age. So you might want to play around that a bit. But I feel this is a trivial one.

All comments

Saish Redkar

Hey timothy-permutable

timothy-permutable

Hey timothy-permutable

Good point. I wonder if I can create a derived event property instead then - I’ll have to see if that’s possible mixing the event props and user props at time of event.

Possibly simpler just to set year of birth at signup, use that as the group by dimension, and accept that it has a (very gradually) changing meaning over long periods of time.

Quick Links

Unanswered Questions

time format on import from Big Query
I am running into a loop when attempting to import data from BigQuery. At origin, my data is already in milliseconds since epoch. If I query: event_time as time, I get the error: 1.'time' column should be a TIMESTAMP_NTZ column (Snowflake) or a TIMESTAMP column (BigQuery). example for the type of 'time' column is…
Import data from one amplitude account to another
How do I transfer data from one amplitude account to another? It seems all the community chats about this have completely broken links. Easy to export, no way to import, very frustrating. :(
@amplitude/plugin-web-vitals-browser build fails on CRA v4 (react-scripts@4.0.3)
When using @amplitude/plugin-web-vitals-browser with Create React App v4 (react-scripts@4.0.3), the build fails with: ./node_modules/@amplitude/plugin-web-vitals-browser/node_modules/web-vitals/dist/web-vitals.js<br /><br />SyntaxError:…
Question about Amplitude Export API Data Delay
Hello, I'm using SpringBoot and Kotlin to integrate with the Amplitude Export API. The official Amplitude documentation (https://amplitude.com/docs/apis/analytics/export) states that "data is available to export at a minimum within 2 hours of when the servers received it." However, there's no clear information about the…
Retrieve via the API users based on a user property
Hello, Is there a way to make a query like: “Give me all the users that have the user property X equal to 10”, by using just any of the APIs, without making a cohort first through the Amplitude’s UI? Thank you!