OptiPin
OptiPin vs PeptidePal
PeptidePal launched in April 2026 and is now the most-reviewed peptide tracker on the US App Store. This page compares it with OptiPin on what each app actually does. We make OptiPin, so we link PeptidePal's listing and website for every claim about it. Where PeptidePal wins, we say so.
The verdict
Choose PeptidePal if you're on Android, want an in-app community forum and AI Q&A, or want the app most other peptide users are already on. It has 4,703 US ratings to OptiPin's 171.
Choose OptiPin if your protocol includes testosterone or other hormones. It estimates testosterone, estradiol and DHT and recalibrates those estimates to your own bloodwork, which PeptidePal does not claim to do. It also costs less and has a real free tier with no account.
Short version: PeptidePal is a peptide and GLP-1 log with reach and community. OptiPin is a protocol tracker built around hormones and labs.
| OptiPin | PeptidePal | |
|---|---|---|
| Platforms | iPhone | iOS + Android |
| Accountto use the app | None | Yesdeletable in Settings |
| Where your data livesprotocol, doses, notes | On your phoneoptional iCloud Sync | On your phoneoptional iCloud sync |
| Peptides & GLP-1s | ✓ | ✓ |
| TRT / hormones | ✓ | -not mentioned |
| Estimated level curve | ✓ | ✓on-board estimate |
| Calibrated to your labsT, E2 and DHT re-fit to bloodwork | ✓ | - |
| Bloodwork log | ✓scan, Apple Health, manual | - |
| AI featureswhat the AI does | ✓insight summaries across your data | ✓Q&A advisor + community forum |
| Recovery score from your watchnightly, compared with your doses | ✓Apple Watch, Whoop, Oura | -no wearable data |
| Vial inventory & run-out alerts | ✓ | ✓ |
| Reconstitution math | ✓ | ✓syringe diagram |
| Injection site rotation | 115 sites | ✓body map heat-map |
| Progress photos | ✓compare, on-device | ✓compare + time-lapse |
| Compound library | 200+ | 50–110+its listing gives both |
| App Store rating (US) | 4.8 · 171 | 4.7 · 4,703 |
| Free tier | 1 compound+ 14-day trial | Limitedlisting: tracking needs a subscription |
| Price (US) | $4.99/mo $39.99/yr | $9.99–14.99/mo $19.99–59.99/yr |
PeptidePal cells checked 29 September 2026 against its US App Store listing and peptidepal.health. Its listing shows several prices at once, so the range is what it lists. "-" means we found no public claim of the feature, not proof it is missing.
Where PeptidePal wins
Reach. PeptidePal runs on iPhone and Android. OptiPin is iPhone only. If you're on Android, PeptidePal works and OptiPin does not.
Reviews. 4,703 US ratings at 4.7 in about five months is a lot of people who stuck with it. PeptidePal's listing says more than 150,000 people use it. Its website says 200,000+. We cannot check that number, but the rating count backs up the idea that it is popular.
Community. PeptidePal has a moderated peer forum and an AI advisor for plain-English educational questions. OptiPin has neither a forum nor a chat. If you want to ask other users how they track something, PeptidePal gives you somewhere to do it.
Extras. PeptidePal has a food tracker and a Spanish version. Both apps compare progress photos. PeptidePal adds a time-lapse and strips photo metadata before storing.
Where OptiPin wins
Hormones and labs. OptiPin was built as a testosterone tracker first. It estimates testosterone, estradiol and DHT from your protocol, then recalibrates those estimates each time you add bloodwork. You can scan a lab report, pull results from Apple Health or type them in. PeptidePal's listing does not mention testosterone modeling or a bloodwork log. Its level curve is an on-board estimate from logged doses. If you run TRT alongside peptides, this is the difference that matters. How our model works is written up in the forecast methodology.
Written insights. OptiPin's AI insight summaries read across your doses, labs, check-ins and Apple Health data, then describe what is moving together. PeptidePal's AI answers general questions. It does not claim to read your own data.
Recovery from your watch. Since September 2026 it also reads your Apple Watch nights (or Whoop, Oura or Garmin data in Apple Health) into a nightly recovery score scored against your own last 60 nights. Health Trends then compares recovery on mornings after injection days with other mornings. It also compares HRV and sleeping heart rate in weeks on each compound against weeks off. PeptidePal reads no wearable data.
Price and free tier. OptiPin is free for one compound with no time limit. Premium is $4.99 a month or $39.99 a year. PeptidePal's listing says protocol tracking needs a subscription, though its website describes a narrower paywall around unlimited stacks and the AI advisor. Its US prices run from $9.99 to $14.99 a month, $29.99 a quarter or $19.99 to $59.99 a year, depending on which offer you see.
No account. Both apps keep protocol data on the phone by default, with optional iCloud sync. OptiPin has no account at all. PeptidePal has one. Its description says analytics are anonymous with no advertising identifier. Its App Store privacy label, though, lists purchases, contact info, identifiers and usage data under "Data Used to Track You". We would read the label, since it is what Apple asks developers to declare.
How to choose
On Android, the choice is made for you: PeptidePal. On iPhone, the question is whether hormones are part of your protocol. If you only log peptides or a GLP-1 and want a community around it, PeptidePal is a good app and a popular one. If testosterone, an AI (aromatase inhibitor), hCG or regular bloodwork are in the picture, OptiPin does things PeptidePal does not. OptiPin's free tier costs nothing to try alongside it.
Frequently asked questions
Is PeptidePal or OptiPin better?
PeptidePal if you're on Android, want a community forum or want the app with the most reviews. OptiPin if you run testosterone or other hormones and want estimates recalibrated to your own bloodwork, or want a free tier with no account.
Is PeptidePal free?
It is free to download. Its listing says protocol tracking, the full library, advanced analytics and AI chat need a subscription, priced from $9.99 to $14.99 a month or $19.99 to $59.99 a year in the US. OptiPin is free for one compound with no time limit.
Does PeptidePal track TRT?
PeptidePal describes itself as a peptide and GLP-1 tracker. Its listing does not mention testosterone modeling or bloodwork. For TRT, see our best TRT tracker apps comparison.
Which is more private?
Both store protocol data on the phone by default. OptiPin needs no account. PeptidePal has an account. Its privacy label lists several data types that may be used to track you. Check both labels on the App Store before you choose.
Peptides and hormones in one private tracker
Free for one compound, 14-day full trial, no card, no account.
Download on the App StoreSources
Checked 29 September 2026. PeptidePal cells describe what its developer publicly claims. We have not tested its level model.
- PeptidePal – Peptide Tracker (App Store) – features, prices, rating count and privacy label
- peptidepal.health – Android availability and iCloud sync
- OptiPin – Peptide & TRT Tracker (App Store) · OptiPin forecast methodology
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