Peptide Tracker Apps
Shotsy vs a Compounded-Peptide Tracker: Which Do You Need?
Shotsy is excellent at what it was built for — prescription GLP-1 pens. Reconstituted, compounded peptides from a vial are a different tracking problem. Here is how to tell which one you actually have.
Search "peptide tracker app" and Shotsy shows up near the top almost every time. It has tens of thousands of ratings, a polished interface, and years of iteration behind it. It is also, by its own design, built for a different problem than the one most compounded-peptide users have. This is not a knock on Shotsy — it is very good at what it does. It is a mismatch problem, and mismatches are what cause tracking errors.
What Shotsy is actually built for
Shotsy's core use case is prescription GLP-1 injections delivered by pre-filled pen — think Ozempic, Wegovy, Mounjaro, Zepbound. Its dose charts, titration tracking, and medication library are built around that model: a pharmacy fills a known-strength pen, you dial or click a fixed dose, and the job of the app is mostly reminders, adherence, and a clean history. That is a real and common need, and Shotsy's review volume reflects how well it serves it.
Verify the current feature list on Shotsy's own listing before assuming anything below is still accurate — apps change their scope over time. As of our last check, it did not advertise a reconstitution calculator or vial inventory, which lines up with a pen-first design: neither is relevant if there is no vial to reconstitute.
What a compounded peptide actually requires
Compounded peptides — BPC-157, TB-500, CJC-1295/ipamorelin, retatrutide from a research source, and dozens of others — usually arrive as lyophilized (freeze-dried) powder in a vial, not a pre-filled pen. Before the first dose exists, you have to reconstitute it: add a measured volume of bacteriostatic water, work out the resulting concentration, and figure out how many units on a 100-unit insulin syringe correspond to your intended dose.
That single calculation is where a large share of dosing mistakes happen, because a units error compounds silently across an entire vial. A tracker built for pens has no reason to include this step. A tracker built for compounded peptides has to put it front and center.
| Need | Pen-based tracker (e.g. Shotsy) | Compounded-peptide tracker |
|---|---|---|
| Fixed-dose pen logging | Core feature | Usually supported too |
| Reconstitution / units calculator | Not the focus | Core feature |
| Vial inventory with expiration | Not applicable | Core feature |
| Multiple compounds run as a stack | Less common use case | Common use case |
| Injection-site rotation | Often included | Often included |
| Approved-medication dose charts | Strong, clinical-data-backed | Not the focus |
The honest way to decide
Ask yourself one question: do you ever reconstitute anything?
- If every compound you take arrives ready to inject at a known concentration — a prescription pen, a pharmacy-filled syringe — a pen-first app like Shotsy is a reasonable, well-supported choice, and switching away from it for its own sake buys you nothing.
- If you are mixing powder and BAC water yourself, tracking a vial's remaining volume, or running more than one compound at a time, you need the reconstitution math, inventory, and multi-compound handling that a pen tracker was never built to do.
The two use cases overlap in one place — logging a dose and a date — and diverge everywhere else. See our full comparison of 24 peptide tracker apps for how the rest of the category, Shotsy included, stacks up on this exact split.
Where LynkDose fits
LynkDose was built for the reconstituted-vial side of that split. It has vial inventory with expiration reminders, injection-site rotation, dose reminders, and an AI assistant that can act directly on your logs — creating a reminder or logging a dose from a plain-language request rather than just answering questions about them.
The part that goes beyond logging is per-compound outcome correlation: if you are running more than one peptide, LynkDose scores each one independently against Apple Health metrics (weight, sleep, HRV, resting heart rate, body fat) and a daily journal (energy, focus, pain, libido, anxiety, mood), so a stack becomes readable compound by compound instead of one blended guess. See how to build and track a peptide stack for more on why that separation matters once you run more than one compound at once.
It is iPhone-only, keeps data local-first on your device, and is free to download with a 7-day free trial, then $9.99/month or $40/year. If you just want to check the reconstitution math without installing anything, the free web calculator does that on its own.
This is not medical advice
Nothing here recommends a dose, a protocol, or a specific compound. Many peptides discussed on this site are research compounds not approved for general human use. Talk to a qualified healthcare provider before starting, stacking, or changing anything.
Neither app is "better" in the abstract. They were built for different syringes, and picking the wrong one just means fighting the tool instead of using it.
Built for reconstituted, compounded peptides
Vial inventory, injection-site rotation, and per-compound analytics against your Apple Health data — in one local-first iPhone app.
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Frequently asked questions
Can I use Shotsy to track compounded peptides?
You can log a dose and a date in Shotsy for almost anything, but its core tools — pen-based dose tracking and titration schedules built around approved medications like semaglutide and tirzepatide pens — are not built for reconstitution. It has no calculator for converting a vial and BAC water into a units draw, which is the step where compounded-peptide users most often make mistakes. Always verify the current feature list on Shotsy’s own App Store listing, since apps change.
What is the difference between a GLP-1 pen tracker and a compounded-peptide tracker?
A pen tracker mainly needs to log a fixed, pre-filled dose on a schedule. A compounded-peptide tracker additionally needs reconstitution math (vial strength, BAC water volume, target dose, units to draw), vial inventory with expiration and mix-date tracking, and support for multiple simultaneous compounds, since compounded protocols are more often stacks than single medications.
Is LynkDose a good Shotsy alternative for compounded peptides?
If you are reconstituting powder from vials rather than using a pre-filled pen, LynkDose is built around that workflow: vial inventory with expiration reminders, injection-site rotation, and per-compound outcome scoring against Apple Health and a daily journal. It is iPhone-only, local-first, free to download with a 7-day trial, and $9.99/month or $40/year after that. If you are on a prescription pen with no reconstitution involved, Shotsy or a similar pen-focused app may still be the simpler fit — pick for the job, not the name recognition.
Your peptide tracker, done right
LynkDose logs every dose, manages your vial inventory, rotates injection sites, and charts your results against HealthKit data — all private and on-device.
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