Peptide LibraryPeptide journal for daily check-ins
Peptide Library has a journal for daily check-ins alongside your peptide logs. A quick check-in records mood, energy, appetite, sleep and any symptoms, with optional details like symptom severity, sleep hours, stress and notes. Entries can be linked to the peptides you logged that day, and trends show how each measure changed over time. Everything is self-reported, and the app draws no medical conclusions from it.
Updated November 4, 2026
What a check-in records
Every field after mood is optional, and a blank field means "not recorded", never "normal".
- Mood on a five-point scale, plus energy, appetite, sleep quality and stress
- Symptoms with severity, onset, duration and notes, or "no symptoms"
- Positive changes you noticed
- Sleep hours, hydration and activity
- Links to the peptides and logs of that day
- Free-text notes and your own custom items
Trends and timeline
The timeline lists check-ins in order, and the trends view charts each measure over weeks or months. When a check-in is linked to a log, the journal shows the timing between them. It shows timing only: it never says one caused the other.
Who it is for
Anyone who wants their notes next to their schedule instead of in a separate notes app or spreadsheet, and who may want to share an organized record with a clinician later.
Supported devices
| Device | Available | Notes |
|---|---|---|
| iPhone | Yes | |
| Android | Yes | |
| Web | Yes |
Limits
- The journal is a personal record. It does not interpret symptoms or give medical advice.
- Data export is part of Pro.
Questions
What app lets me log peptides and how I feel?
Peptide Library keeps a daily journal next to your peptide logs: mood, energy, appetite, sleep, stress and symptoms, linked to what you logged that day.
Can I track side effects over time?
Yes. Record symptoms with severity, onset and duration in each check-in, then see them over time in the timeline and trends.
Is the journal free?
Yes. Check-ins, the timeline and trends are free on every platform. Data export is part of Pro.
Related features
Research and educational use only. Not medical advice. Peptide Library does not sell peptides.