Compare like with like
Keep track of changes to bedding or room conditions. Six entries allow a comparison of the first three and latest three; personal ratings do not prove why comfort changed.
Make your next decision
Sleep Trial Diary
Record comfort, warmth and partner movement, then export your own return-deadline reminder.
One mattress trial per browser, up to 180 dated entries. No account, upload or AI processing. Export your records before clearing browser data. This diary does not send background notifications.
Your observations (0/180)
No entries yet. Start with your first night.
Quick guide
Sleep Trial Diary: what to check first
Use this tool as a starting point, then confirm product details, health guidance, seller terms, and live availability where relevant before making a final decision.
Step 1
Copy the seller deadline
Step 2
Record one entry per date
Step 3
Compare observations and export your records
Keep control of your records
The diary stays in this browser. Export the JSON file before clearing browser data. A new trial requires clearing the previous diary.
Frequently asked questions
Will the site remind me automatically?
No. Export and import the calendar file into your own calendar, then verify its alert. Your entered date is not checked against seller policies.
Are notes sent to AI?
No. The diary is stored locally in this browser. It is separate from the shortlist and is not shared with the AI advisor.