Digital diariesUpdated September 26, 2026

Retire the paper diary. Keep every entry honest

Paper diaries get filled in the night before the visit, lost or misread. A digital patient diary records when each entry was made, can lock late entries and puts the data in front of your team the same day.

  • Timestamped entries
  • Late entries locked or flagged
  • Blank diary PDF for ethics

Free sandbox · No credit card · 21 CFR Part 11 compliant

  • ISO 27001 certified
  • 21 CFR Part 11 compliant
  • GDPR compliant
  • EU and US data hosting
  • HIPAA compliant
  • ICH GCP E6(R3) compliant

Paper diary · week 3

Mon pain 3
Tue pain 4 ... 5?
Wed pain 3
Thu

Filled in when?

Digital diary · week 3

Mon321:14
Tue520:47
Wed322:02
ThuMissedWindow closed

Every entry server-timestamped

100%

of entries server-timestamped

0

transcription from paper

Same day

data visible to your team

1 click

blank diary PDF for ethics

Why switch

Paper diary vs digital diary

When it was filled in
Unknown, often the night before the visit
Recorded with a server timestamp
Late entries
Impossible to detect
Locked, flagged or marked missed by your rule
Getting the data
Collected at the visit, then transcribed
Available to the team the same day
Legibility
Handwriting and crossed-out answers
Structured answers, checked on entry
Lost diaries
Gone with the booklet
Stored in the study, with an audit trail

Integrity

Entries that happen when they should

Each diary entry opens in its own window. With a hard window, it locks once that window closes, so backfilling becomes impossible rather than just discouraged.

  • Hard, soft, warning-only or auto-close windows.
  • Every answer attributed and timestamped by the server.
  • Missed entries closed out with a reason.
Day 25Target: day 28Day 31

Window -3 / +3 days around the anchored target date

Soft window

Stays available with a protocol deviation flag

Hard window

Locks outside the window

Warning only

Stays available with a warning

Auto-close

Marked missed when the window closes

Richer data

More than a paper diary could hold

A digital diary can collect things a booklet cannot: a photo of a rash, an episode reported the moment it happens, or an entry completed by a caregiver.

  • Photo capture from the phone camera.
  • Report an episode at any time between scheduled entries.
  • Entries by the participant or a caregiver.
  • Scales and sliders that never default to a value.

Evening diary

Question 3 of 8

How would you rate your fatigue today?

0 = no fatigue, 10 = worst imaginable

012345678910
Add a photo (optional)
BackNext
● Answers saved as they go

Turn your paper diary into a digital one

Upload your paper diary to the AI form builder in a free sandbox and review the digital version.

Go digital free

Conversion

From your paper diary to a digital draft in minutes

Upload the current paper diary as a PDF or DOCX and the AI form builder drafts the digital version. Review it, adjust it and attach it to your schedule.

  • AI drafts questions from your existing diary.
  • Diary templates for sleep, pain, fatigue and GI symptoms.
  • Nothing is saved until you review and apply it.
Build this form with AI

Question form

CRF or ePRO

Lab table

Analytes, units, ranges

Vital signs form: BP, pulse, temperature, respiratory rate, weight
Upload CSV, XLSX, PDF or DOCX
14 questionsReview before applying
  • 1. Systolic blood pressure

    Required · Number · mmHg · 0 dp

    Number
  • 2. Diastolic blood pressure

    Required · Number · mmHg · 0 dp

    Number
  • 3. Pulse rate

    Required · Number · beats/min

    Number
  • 4. Body temperature

    Required · Number · °C · 1 dp

    Number
  • 5. Position during measurement

    Required · Sitting, Supine, Standing

    Single choice
  • + 9 more questions
Back Apply to form

Ethics submission

Show the ethics committee exactly what patients will see

Export a blank ePRO PDF laid out the way the diary appears on a phone, with every item, answer option and skip rule, and the schedule each diary follows.

  • Cover page with version and effective date.
  • Each diary in phone layout, with skip logic explained under the item.
  • Licence details shown for licensed instruments.

Blank ePRO · patient questionnaires

Evening diary

Daily 18:00 to 24:00, Visit 1 to Visit 15

2. Did you take your study medication today?

○ Yes○ No

Question 3 shown only if No.

Blank · no participant dataPage 4 of 11

FAQ

Questions teams ask before they switch

Something not covered here? Ask us directly.

What is a digital patient diary?

An electronic version of the paper diary participants keep between study visits. Entries are made on a phone or tablet, timestamped and sent to the study team immediately.

Why replace paper diaries?

Paper diaries cannot show when they were filled in, so backfilling goes unnoticed. They also need transcription, can be lost and are hard to read. A digital diary solves each of these.

Can a digital diary prevent backfilling?

Yes. With a hard window, each entry locks when its window closes, so participants cannot complete it later.

How do I convert our paper diary?

Upload it to the AI form builder as a PDF or DOCX. It drafts the digital questions for you to review, adjust and apply.

What do we submit to the ethics committee?

Capture exports a blank ePRO PDF showing each diary as it appears on a phone, with answer options, skip logic and schedule.

Can caregivers make entries?

Yes. A diary can be set to be completed by the participant or a caregiver.

Do participants need an app?

No. Participants open a secure link in their phone or tablet browser.

Can I try it for free?

Yes. Build a digital diary in the free sandbox. No credit card is needed.

Retire your paper diary

Free sandbox with nearly every feature. No credit card, no sales call.

Go digital free