Free PWA from a solo developer — lightweight Shotsy alternative with dose charting.
| Feature | DoseDiary | Protokol Lab |
|---|---|---|
| Dose tracking with half-life curves | ✓ | ✓ |
| Weight tracking + trend | ✓ | ✓ |
| Calorie / macro tracking | ✗ | ✓ |
| Rolling 7-day calorie budget | ✗ | ✓ |
| Food barcode scanning | ✗ | ✓ |
| Symptom severity 0–10 scale | ✗ | ✓ |
| Multi-compound stacks | ◐ | ✓ |
| Agentic AI assistant | ✗ | ✓ |
| Pricing | Free | Free + $6.58/mo |
You want free, no-friction dose + weight tracking and you don't need sophisticated macro tracking, AI, or correlation analytics.
You want dose tracking plus full macro logging with a weekly rolling budget, plus 0–10 symptom severity, plus an AI that reads all of it together. DoseDiary is great at a slice of the problem; Protokol Lab is the whole picture.
Yes. The free tier of Protokol Lab covers dose tracking with half-life curves, weight trend, symptom logging, and up to 3 custom compounds — the overlap with DoseDiary is essentially complete for the free feature set.
No. Protokol Lab is a commercial product with a free tier. DoseDiary is developer-maintained but not open source either; the free-forever model is its distinctive commitment.
Real data. No signup required.