Peptide Plug vs TRT Monitor
TRT Monitor is a focused testosterone-therapy tracker built around injections, blood markers and symptom trends, with shareable clinician reports and AI-assisted lab import. Peptide Plug covers TRT as one protocol among several and adds the vial, cost and calculator layer.
Short version
TRT Monitor is the stronger fit if testosterone therapy is the only thing you track and you want AI lab import and a polished shareable report. Peptide Plug is the stronger fit if you run more than one protocol, need reconstitution or dose-split math, or want cost per dose and vial run-out. TRT Monitor is £3–£5/month with no feature gating; Peptide Plug is $4.99/mo or $49.99/yr.
Feature-by-feature
Based on TRT Monitor's published product and pricing pages and this Peptide Plug build, reviewed September 9, 2026.
| Feature | Peptide Plug | TRT Monitor |
|---|---|---|
| Platforms | Installable web app for phone, tablet and desktop | Not stated; described as phone and laptop |
| Price | $4.99/mo or $49.99/yr | £5/mo, £4/mo quarterly, £3/mo annual (£36/yr) |
| Free tier | 1 active cycle, all public calculators, no card | Free first month, then subscription |
| Feature gating | Free tier limited to 1 active cycle | No tiers — every plan identical |
| Dose logging | ✓ Injections, cycles, titration steps | ✓ Injections, gels, tablets |
| Blood test tracking | ✓ Manual labs with chart overlays | ✓ Markers vs reference ranges + AI import |
| Symptom trends | ✓ Configurable daily markers | ✓ Mood, energy and more with trend charts |
| Clinician report | ✓ Full JSON + CSV export | ✓ Shareable progress report |
| Injection-site rotation | ✓ Site logged per injection with previous site shown | ✓ Site rotation |
| Reconstitution / dose-split math | ✓ Full reconstitution, blend and syringe-unit math | Not stated |
| Cost per dose / run-out | ✓ Cost per dose, per month and vial run-out forecasting | Not stated |
| Inventory & expiry | ✓ Vials, diluent, reorder and mixed-vial expiry alerts | Not stated |
| Covers GLP-1, peptides, HRT | ✓ One timeline for all | TRT-focused |
| Public calculators | ✓ 17 free, no account | Not stated |
Sources: trtmonitor.com and its pricing page. Prices are listed in GBP as published.
Where each one wins
Neither is better at everything. These are the honest trade-offs.
Pick Peptide Plug for
- You run TRT alongside a GLP-1, peptides or HRT and want one timeline.
- You need weekly-total-to-per-injection math, or free-testosterone estimation from labs.
- You want cost per dose and a vial run-out date.
- You want free calculators with no account and no subscription.
- You want the half-life figures behind the level curve published with their evidence level.
Pick TRT Monitor for
- Every plan is identical — no feature gating at any price.
- AI-assisted import of blood test results, which we do not offer.
- Blood markers plotted directly against reference ranges.
- A purpose-built shareable report for a doctor.
- Cheaper on the annual plan at £36/year.
Which should you pick?
For TRT alone, TRT Monitor is cheaper and has lab features we do not. Peptide Plug wins when TRT is one of several protocols, or when the vial and cost arithmetic matters as much as the log.
Common questions
Which is cheaper?
Which is better if I only do TRT?
Which is better if I also run a GLP-1 or peptides?
Does Peptide Plug estimate free testosterone?
Do either give medical advice?
Try the free tools first
Every Peptide Plug calculator runs in your browser with no account and nothing stored.
Open the free tools