OptiPin Explained: What the TRT/Peptide Tracker Actually Does

OptiPin is an iOS-only app from Vitaloom LTD for tracking TRT, peptides, and GLP-1 protocols, covering 200+ compounds and 40+ injection sites with on-device, no-account data storage. It costs $4.99/month or $39.99/year after a 14-day trial. This guide breaks down its features, calculator logic, injection guidance, and where it falls short for users who need cross-platform access or deeper analytics.

Table of Contents

• What Is OptiPin and Who Makes It?
• OptiPin Pricing: Free Trial, Monthly, and Annual Plans
• Core Features: Injection Tracking, Reminders, and Inventory
• Safety and Privacy: On-Device Data, No Account Required
• How the Peptide Calculator Handles Units and Bacteriostatic Water
• Injection Sites, Needle Gauge, and Subcutaneous vs. Intramuscular
• Platform Availability and Launch Timeline
• Limitations and What to Consider Instead

What Is OptiPin and Who Makes It?

OptiPin is a mobile app built for people managing testosterone replacement therapy, peptide protocols, and GLP-1 medications like semaglutide or tirzepatide. It’s developed by Vitaloom LTD and positioned as a companion for hormone optimization, with medication tracking, symptom logging, hormone trend visualization, and treatment management baked into the core experience. Worth noting: the name “OptiPin” is also used by an unrelated German bakery-labeling software product, so if you’re searching and land on a page about nutritional declarations or allergen labels, you’ve found a different tool entirely. The TRT-and-peptide app version is the one relevant to biohackers, TRT patients, and GLP-1 users. If you’re evaluating tracking apps broadly, it’s worth comparing feature depth across a few options — our rundown of what actually matters in a tracking app is a useful starting point before committing to any single tool.

OptiPin Pricing: Free Trial, Monthly, and Annual Plans

According to the maker’s own press materials, OptiPin is a free download that includes a 14-day full trial of its paid features before you’re asked to subscribe. After the trial, pricing runs $4.99 per month or $39.99 per year, which works out to roughly $3.33/month on the annual plan — a meaningful discount if you’re planning to track a protocol for more than a few months. There’s no lifetime tier mentioned in available materials, which is a notable gap compared to apps that offer one-time purchase options for users who dislike recurring subscriptions. For someone running a single 12-week peptide cycle, the monthly plan covers the cost without long-term commitment; for ongoing TRT management measured in years, the annual plan is the more economical path. Either way, the trial period gives enough runway to test whether the logging workflow fits your routine before paying anything.

Core Features: Injection Tracking, Reminders, and Inventory

OptiPin’s feature set centers on full protocol logging: dose scheduling, injection tracking across more than 40 rotation sites, and inventory management so you know what’s running low before you run out. The press kit also lists reminders, progress photos, and analytics — including adherence trends and bloodwork-based level forecasting — as part of the package. The compound library reportedly spans 200+ substances, covering TRT esters, GLP-1 medications, peptides, and common blends, which is a wide net for a single app to cast. That breadth matters if you’re stacking multiple compound types (say, testosterone cypionate alongside a peptide like BPC-157), since switching between separate apps or spreadsheets for each protocol type creates friction and missed doses. For a broader checklist of what a well-built protocol tracker should include beyond the basics — things like titration schedules and pause/resume logic — see our guide to must-have TRT tracking app features.

Safety and Privacy: On-Device Data, No Account Required

OptiPin’s privacy model is built around keeping data local: the app stores information on-device and doesn’t require creating an account to use it, according to both the maker’s product page and press kit. For health data as sensitive as injection logs, hormone levels, and medication inventory, this on-device-only approach reduces exposure compared to apps that sync everything to a cloud server by default. The tradeoff is that on-device-only storage typically means no cross-device sync — if you switch phones or lose your device, your history may not transfer automatically unless you’ve manually backed it up. This is a reasonable design choice for privacy-conscious users, but it’s worth understanding the limitation before you rely on the app as your only record. Anyone managing a multi-year TRT protocol should think about how they’d recover their dosing history if their phone were lost, damaged, or replaced.

How the Peptide Calculator Handles Units and Bacteriostatic Water

OptiPin includes a reconstitution calculator that converts vial size, bacteriostatic water volume, and target dose into syringe units, and can also work backward — calculating how much bacteriostatic water you need given a target dose and desired unit count. According to the app’s own FAQ, the calculator outputs results in insulin-syringe units and defaults to a 30-unit syringe, which it describes as the most common size used for peptide dosing. This kind of calculation is one of the most error-prone parts of self-administered peptide therapy, since a mistake in the water-to-powder ratio can meaningfully change the actual dose delivered per unit drawn. If you want a deeper walkthrough of the underlying math — including how molarity factors into these conversions — our explainer on reconstitution calculator molarity breaks down the formula step by step, which is useful context regardless of which app you use to run the numbers.

Injection Sites, Needle Gauge, and Subcutaneous vs. Intramuscular

OptiPin’s TRT injection guide recommends 23–25 gauge needles at 1–1.5 inches for intramuscular injections, and 27–30 gauge needles at 0.5 inches for subcutaneous injections — with an 18–21 gauge needle used to draw medication from the vial before swapping to the finer injection needle. These gauge ranges align with general clinical practice: thicker draw needles move viscous oil-based testosterone faster, while thinner injection needles reduce tissue trauma and discomfort at the injection site. The app also tracks rotation across 40+ potential sites, which matters because repeatedly injecting the same spot raises the risk of scar tissue, lipohypertrophy, and inconsistent absorption over time. Site rotation isn’t optional bookkeeping — it’s a practical safety measure, and an app that flags overused sites before you default back to the same spot out of habit adds real value beyond simple logging.

Platform Availability and Launch Timeline

OptiPin launched in 2025 and, as of this writing, is available exclusively on iOS through the App Store — there is no Android build and no web app, according to the maker’s own press kit and product page. This is a significant constraint for households or communities where Android usage is common; if you’re on Android and searching for a comparable tracker, you’ll need to look elsewhere, since OptiPin simply isn’t built for that platform. The App Store listing appears under a few naming variants (including “Peptide Tracker: TRT OptiPin” and “OptiPin: TRT & Peptide Tracker”) across different country storefronts, but it’s the same underlying app. If cross-platform access matters to you — for instance, if you switch between an iPhone and an Android tablet, or want a tracker your partner on a different OS can also use — platform lock-in is worth weighing before you invest time building a dosing history in any single-platform app.

Limitations and What to Consider Instead

OptiPin’s biggest structural limitation is platform exclusivity: iOS-only, no Android, no web app, which immediately rules it out for a large share of smartphone users. The no-account, on-device-only privacy model is a genuine strength for data security, but it also means no built-in cross-device backup — a real risk if your phone is lost or damaged mid-protocol. If you’re comparing tracking apps, it’s worth checking whether reminders, inventory alerts, and full analytics are gated behind a paywall (as OptiPin’s press materials suggest some are), and whether the compound library and calculator tools match how you actually dose. Pep is built to handle protocol tracking, dose scheduling, symptom logging, site rotation, and reconstitution math across peptides, TRT, and GLP-1 medications in one place — worth a look if you want a tracker without the platform lock-in. You can explore it directly at hellopep.io. For dose-logging fundamentals that apply regardless of app choice, our peptide dose tracking explainer is a solid companion read.

Frequently Asked Questions

Is OptiPin available on Android?

No. According to the maker’s own press materials, OptiPin is iOS-only with no Android build and no web app available as of 2026.

Does OptiPin require an account to use?

No. OptiPin’s product page and press kit state that data is stored on-device and no account creation is required, which is part of its privacy-first design.

How much does OptiPin cost?

OptiPin is a free download with a 14-day full trial, after which pricing is $4.99 per month or $39.99 per year, per the maker’s press kit.

What does OptiPin’s reconstitution calculator default to?

Per the app’s own FAQ, the calculator outputs results in insulin-syringe units and defaults to a 30-unit syringe, described as the most common size for peptide dosing.

What needle gauges does OptiPin recommend for injections?

OptiPin’s TRT injection guide recommends 23–25 gauge needles for intramuscular injections and 27–30 gauge needles for subcutaneous injections, with an 18–21 gauge needle used for drawing medication from the vial.