This article covers some frequently asked questions about Amplitude instrumentation.
Can values be deleted or altered after ingestion?
Once data is ingested into Amplitude, it cannot be altered. Amplitude's current architecture is based on pre-aggregated sets by the hour, day, week, and month, for both users and events. This allows Amplitude to easily perform large-scale queries, but it does require the data to be immutable. Data can be deleted at the individual user level in compliance with GDPR and other privacy laws via the User Privacy API. More details on this API can be found here.
Device IDs are set differently when sending client-side events (using Amplitude's SDKs) vs server-side events (HTTP API). How is Device ID set?
user_id
. More details here.
No. Each event name must be unique across an entire project. Two events with the same name will be considered the same event. If you notice two events in a project with the same name, it's possible that the display name for one of them was inadvertently set to the same name as another event. You can confirm by expanding the event in Amplitude Data to see more details. Can array values be sent into Amplitude?
Yes. However, Amplitude doesn't support exact matching on array properties. The contains operator can be used to filter for values within an array. Can two different events have the same name?
A null value will be returned if Amplitude is unable to parse device information from the device or browser, or if the device is not mapped in Amplitude's system. If you would like new device values to be mapped, please reach out to Amplitude's support team with the following information:Why is device information (like Device Type or Device Family) returning ‘null’ in my project?
The events ingested through Amplitude's SDK will maintain the same session if the events are coming from the same device. Session ID changes every time the Device ID changes. The default session time-out for JavaScript SDK is 30 minutes. For iOS/Android, it's five minutes.
Why are my sessions generating new Session ID values?
After the first revenue event related to subscription, Apple or Google will have to validate whether or not a subscription is active. If it is, the subscription revenue event should be received by Amplitude at the time interval of that subscription. How can recurring revenue subscription events be sent in?
While Amplitude SDKs use the User Agent to populate some user properties (such as device type), the User Agent itself is not collected or stored. Some customers implement logic to store User Agent as a custom user property and remove bot users that way. Alternatively, if you're able to determine the IP address of a suspected bot user, you can also use Data Filters to block events from that IP address. To learn more, see Amplitude's help center article on blocking bot web traffic.
How do I filter out bot traffic users?
Thanks for your feedback!
October 22nd, 2024
Need help? Contact Support
Visit Amplitude.com
Have a look at the Amplitude Blog
Learn more at Amplitude Academy
© 2024 Amplitude, Inc. All rights reserved. Amplitude is a registered trademark of Amplitude, Inc.