PepTracker alternative: the 17 MB question
Two lean apps with nearly the same brief. Facts from Apple's App Store listings, checked 30 July 2026.
PepTracker: Dose Log and Pinned are two similar record-keeping apps with built-in vial arithmetic. Their current access, trial eligibility and subscription options are shown by Apple before purchase and can change; this comparison does not promise a free Pinned tier. PepTracker was 17 MB and had 4.74 stars from 424 ratings as of 30 July 2026 against Pinned's zero. The durable differences are language, where the data lives, calendar sync, and whether HRT belongs in the same ledger.
Small is a feature, not a shortcoming
At 17 MB, PepTracker is roughly a tenth the size of the largest app in this category. That is not a sign of something missing — its listing describes protocol building for peptides, GLP-1s and testosterone, a dose calculator that takes vial amount, diluent volume and target amount and returns the exact millilitres or insulin-syringe units to draw, reminders, a home screen showing what is due, a calendar, and weight tracking.
An app that does its job in 17 MB has made deliberate choices about what not to include, and there is a real audience for exactly that. Pinned has made similar choices for similar reasons, which is why this comparison has less daylight in it than most on this site.
The numbers, as of 30 July 2026
Same iOS floor, same commercial model, same broad idea. 424 ratings against zero is the one row where the gap is not close.
| Fact | PepTracker: Dose Log | Pinned |
|---|---|---|
| App Store rating | 4.74 | No rating yet |
| Ratings | 424 | 0 |
| Price | Free to download, in-app purchases | See App Store listing |
| Minimum iOS | 18 | 18.0 |
| Download size | 17 MB | 38 MB |
| Built around | A deliberately small dose log — the lightest app in the category | Peptides, TRT, HRT and GLP-1 in one ledger, with reconstitution maths |
Where they overlap almost exactly
It would be easy to invent a distinction here, so it is worth naming the overlap directly. Both apps build protocols with custom schedules and reminders. Both show what is due today. Both convert vial strength and diluent volume into what to draw. Both track weight over time. Their subscription details differ, so check each current App Store listing before subscribing.
If you install both and use them for a week on a single compound, they will feel more alike than different. That is a fair description of the situation, and anyone telling you otherwise is selling something.
The four things that actually differ
Once the overlap is set aside, the deciding factors are specific and small enough to check against your own situation.
- Language: Pinned ships in English, Dutch, French and German. If you would rather run your record in your own language, that is the clearest reason to pick it.
- Data custody: Pinned has no account and no server — the record lives on the device with an optional Face ID lock, which also means no sync and no cloud backup.
- Calendar sync: PepTracker's premium tier includes syncing logs with Apple and Google Calendar. Pinned does not integrate with any calendar.
- HRT: Pinned treats hormone replacement as a first-class category alongside TRT, peptides and GLP-1s, plus orals and nasal sprays in the same timeline.
Which to pick
Pick PepTracker if you value the smallest possible install, if you want your doses appearing in your normal calendar, or if 424 ratings buy you confidence that a zero-rating app cannot.
Pick Pinned if you want the interface in Dutch, French or German, if HRT is part of what you log, or if you specifically do not want a health record leaving your phone — knowing that this costs you sync and backup.
These pages compare software, not treatments. Pinned records and converts what you enter, does not recommend compounds, sources, doses, or protocols, and is not a medical device. Nothing here is medical advice — consult a licensed clinician before starting or changing anything.
Common questions
- Is Pinned as small as PepTracker?
- No. PepTracker was 17 MB on 30 July 2026, the smallest in this category, against Pinned's 38 MB — still on the lean side of the field, but more than twice PepTracker's footprint. If the smallest possible install is what you are optimising for, PepTracker wins that outright.
- Do both apps calculate what to draw?
- Yes. PepTracker's listing describes entering vial amount, diluent volume and target amount to get millilitres or insulin-syringe units. Pinned's calculator does the same and also runs backwards, from a chosen unit count to the dilution that produces it, with concentration and remaining volume carried per vial.
- Can Pinned put my doses in my calendar?
- No. Pinned has its own schedule and reminders but does not write to Apple or Google Calendar. PepTracker's premium tier includes that, and it is a genuine reason to prefer it.
- How can I compare Pinned's features?
- Compare each current App Store listing before choosing an app.
- Does either app tell me what to run?
- 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.