Testosterone Cypionate Tracker for iPhone

OptiPin is a private testosterone cypionate tracker that turns your TRT protocol into a clean, reviewable record. Log every IM or SubQ injection, rotate across 100+ injection sites with automatic least-recently-used rotation, track total and free testosterone, estradiol and hematocrit, manage vial inventory with reorder reminders, and see blood-level projections over your dose timeline. Everything stays on your device; no account, no cloud upload.

By OptiPin·Updated June 2026

Prescription-only - controlled substance

Use only under a prescriber's supervision. Testosterone cypionate is a prescription-only controlled substance and is banned in sport under WADA. Your dose, schedule and route are decided with your prescriber. OptiPin is a tracking tool; it does not recommend a dose or endorse obtaining testosterone outside a prescription.

Track your testosterone cypionate on iPhone

Injection log, automatic site rotation, bloodwork tracking, vial inventory with reorder reminders and blood-level projections - private and on-device. Free to start.

Download on the App Store

Class

Testosterone ester

Schedule

1-2x weekly

Half-life

~8 days

Privacy

On-device

Why track testosterone cypionate at all

Testosterone cypionate is a long-acting injectable testosterone ester (brand name Depo-Testosterone) used for TRT, with a roughly eight-day half-life, so each injection stacks toward steady state over several weeks. Typical TRT doses sit around 100 to 200 mg per week, often split once or twice weekly because more frequent dosing tends to give steadier levels. Because it is given intramuscular or subcutaneous on a recurring cadence, there are two things a notes app won't keep straight: which sites you have used recently and how your bloodwork moves against your dose over time. A tracker makes both visible, and lets you tie symptoms, energy and bloodwork to which week and which dose you were on.

OptiPin handles the protocol side natively - log the injection, let it pick your next site, and every dose lands on a timeline you can actually read.

What the OptiPin testosterone cypionate tracker does

Injection log + reminders

Record each IM or SubQ injection on a once- or twice-weekly cadence and get reminded on the due day so a shot never slips.

Automatic site rotation

Rotate across 100+ injection sites with set-and-forget least-recently-used rotation - it always suggests the site you have used least recently.

Bloodwork over your dose timeline

Track total and free testosterone, estradiol and hematocrit, charted directly over your injections so trends are obvious.

Side-effect & symptom logging

Note energy, libido, mood and other markers, and see how they line up with each dose week.

Blood-level projections

See how once- or twice-weekly injections stack toward steady state on a roughly 8-day half-life.

Vial inventory & reorder reminders

Log your vials and OptiPin estimates remaining doses and an empty date, reminding you to reorder before you run out.

CSV import & export

Bring an existing dose history in from a spreadsheet, or export your log to share with your prescriber.

Running testosterone cypionate alongside other compounds, or managing a full protocol? OptiPin tracks it next to everything else on one timeline. For injection technique, sites and rotation, see the TRT injection guide, and for what to test and when, see bloodwork tracking.

Free dose tools for testosterone cypionate

Calculators that pair with tracking - no app needed to use them:

TRT dose calculator - work out weekly testosterone in milligrams from concentration and injection volume (and in reverse).
TRT injection guide - IM vs SubQ, sites, rotation and technique, with a not-a-prescriber posture.
Bloodwork reference - total and free testosterone, estradiol and hematocrit, and how to read the trend.
Medication library - how OptiPin models testosterone esters and other compounds.

One app for everything you're on

The real advantage of OptiPin is that testosterone cypionate doesn't live in isolation. If you're also on an aromatase inhibitor, a peptide, or a supplement stack, all of it sits in one place with a single timeline and one set of insights - instead of fragmented across a notes file and your memory. That's the difference between logging a compound and actually seeing your protocol.

Not medical advice, not a dose, not a sourcing guide. Testosterone cypionate is a prescription-only controlled substance. OptiPin records and reminds - it does not recommend a dose, a schedule, or whether to use testosterone, and does not endorse obtaining it outside a prescription. The dose tools above are arithmetic for whatever your prescriber specifies. Discuss any change to your protocol with your prescriber.

Start tracking today

Your testosterone cypionate, on a timeline you control

Injections, site rotation, bloodwork, blood-level projections and reorder reminders - private, on-device, free to start.

Download on the App Store

FAQ

Is there an app to track testosterone cypionate?

Yes - OptiPin. You log each IM or SubQ injection, rotate across 100+ injection sites with automatic least-recently-used rotation, track bloodwork like total and free testosterone, estradiol and hematocrit, manage vial inventory with reorder reminders, and see blood-level projections over your dose timeline. It's on iPhone, stores data on-device and needs no account.

What is a typical testosterone cypionate dose?

Typical TRT doses fall around 100 to 200 mg per week, often split once or twice weekly since more frequent dosing tends to give steadier levels on a roughly 8-day half-life. It's a prescription-only controlled substance, so your dose and schedule are decided with your prescriber. OptiPin records and reminds; it does not recommend a dose. See the TRT dose calculator.

Does OptiPin rotate injection sites for testosterone cypionate?

Yes. OptiPin tracks 100+ injection sites and uses automatic least-recently-used rotation, so it suggests the site you've used least recently. It works for both intramuscular and subcutaneous injection. See the TRT injection guide.

Can it track bloodwork alongside testosterone cypionate?

Yes. Log total and free testosterone, estradiol, hematocrit and other markers, and OptiPin charts them over your injection timeline so you can see how bloodwork tracks against weeks on each dose.

Does the tracker work offline and keep my data private?

Yes. Everything is stored on-device and works offline. There's no account and no required cloud sync, so your log isn't uploaded to a server.

Educational only, not medical advice. Testosterone cypionate is a prescription-only controlled substance, banned in sport under WADA. OptiPin is a tracking tool and does not provide dosing or treatment advice, nor endorse obtaining testosterone outside a prescription. Discuss any change to your protocol with your prescriber.

TRT guide · TRT injection guide · TRT dose calculator · Bloodwork · Medication library