OptiPin alternative: the closest app to Pinned, compared frankly

This is the closest comparison on the site

Every other page here can point at a difference in shape — GLP-1-first, general medication, TRT-only, deliberately minimal. This one cannot, and the verified positioning data says so outright: OptiPin covers peptides and TRT together, like Pinned does.

The similarities go further than category coverage. OptiPin's own listing describes a reconstitution and unit calculator that takes vial size, diluent volume and target amount and returns syringe units, or works backwards from units to diluent — the same bidirectional design Pinned uses. It describes no account, data staying on the device, injection-site rotation, inventory with discard dates and low-stock alerts, bloodwork charted against the dose timeline, and a first compound that is free with no time limit and no card.

If you were expecting this page to explain why the other app is a compromise, it will not, because it is not.

The numbers, as of 30 July 2026

One row goes marginally Pinned's way: iOS 18.0 against 18.1. OptiPin has the narrowest device floor in this entire comparison set. It is a small edge and it only matters if you are on exactly that release.

Where OptiPin is ahead

Listing these is more useful than burying them, and there are several.

• Track record: 4.71 from 139 ratings, against Pinned's zero. That gap is the single strongest argument on this page and it is not in Pinned's favour.
• Backup: its listing describes an optional encrypted iCloud backup. Pinned has no backup and no sync at all — if the phone goes without a device backup, the record goes with it.
• Modelled levels: estimated concentration curves for testosterone, DHT, E2, GLP-1s and dozens of other compounds. Pinned models nothing.
• Pre-set blends: one-tap setup for common multi-peptide combinations. Pinned has no equivalent shortcut.
• Cost per dose: its inventory tracks what each dose actually costs you. Pinned tracks remaining volume and discard dates but not cost.
• Languages: its App Store listing is published in six, including Dutch, French and German — two more than Pinned's four.

Where Pinned differs, narrowly

The differences are real but small, and worth judging on whether any of them happens to be your situation.

HRT as a named category. OptiPin's listing leads with TRT, peptides and GLP-1 therapy. Pinned names hormone replacement alongside testosterone as a first-class category, and its ledger also covers oral medications and nasal sprays. If your record includes HRT or non-injectables, Pinned was explicitly designed for that combination.

No modelling, on purpose. OptiPin's estimated-levels feature is genuinely useful and many people want it. Pinned does not do it, because estimating what is in your system is a step from record-keeping toward inference, and Pinned's Terms keep it on the record-keeping side. That is a preference, not a capability gap — but if you want the curves, OptiPin has them and Pinned will not.

Face ID lock and PDF export. Pinned can lock the app behind Face ID, its Apple Health import is read-only and limited to what you select, and the full record exports as CSV or PDF from inside the app as part of Pinned Pro.

Which to pick

For most people reading this today, OptiPin is the safer choice: it does everything Pinned does, several things Pinned does not, and 139 people have publicly said it works. Recommending it here costs nothing, because a comparison that only flattered its own product would not be worth reading.

Pinned is the better fit in specific cases — an HRT or mixed injectable-and-oral record, a preference for an app that never estimates anything, or wanting a Face ID lock over a cloud backup. If none of those describe you, the honest recommendation is the app with the track record.

FAQ

Is Pinned just a copy of OptiPin?

They arrived at similar designs because the problem has a natural shape: one ledger across categories, a bidirectional calculator, local storage, one compound free. The overlap is real. The differences are HRT and non-injectables as named categories, the absence of any modelling in Pinned, and a Face ID lock — set against OptiPin's longer feature list and its 139 ratings.

Which app has the better calculator?

Both listings describe the same capability — vial size and diluent volume to syringe units, and units back to diluent. There is no honest basis for calling either better without testing both against a calculation you already know the answer to, which is worth doing regardless of which you choose.

Does Pinned back up to iCloud?

No. OptiPin's listing describes an optional encrypted iCloud backup; Pinned has no backup, no sync and no server. The record exists on the device, behind an optional Face ID lock. That is deliberate, and the cost is that a lost phone without a device backup means a lost record.

Which supports more languages?

OptiPin's App Store listing is published in six languages as of 30 July 2026, including Dutch, French and German. Pinned ships in four: English, Dutch, French and German.

Which runs on my iPhone?

OptiPin listed iOS 18.1 as its minimum on 30 July 2026 — the highest floor in this comparison set — and Pinned listed 18.0. Both require a recent device; several other apps in this category support considerably older ones.

Do either of these apps recommend a protocol?

Pinned does not. It converts numbers you enter and records what you log, and it does not recommend compounds, sources, amounts or protocols. It is not a medical device. Consult a licensed clinician before starting or changing anything.