PepX vs Vialmetry
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PepX
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The private peptide tracker for your protocols — peptides, GLP-1s like semaglutide and tirzepatide, TRT and more. Log every dose, rotate injection sites, get discreet reminders and see your progress, all on your device. PepX is a personal tracking journal built as a real system of record, not a generic pill reminder. No account. No login. No cloud. Just your data, on your phone. WHY PEPX • Purpose-built for peptides and compounds — not a one-size-fits-all habit tracker • Everything in one place: protocols, doses, inventory, bloodwork, body metrics, and photos • Private by design: your records stay on your device, protected by Face ID / Touch ID • Works fully offline — nothing to sign up for TRACK EVERY DOSE • Build multi-compound protocols with schedules, titration steps, and on/off cycling • Log doses fast — mark taken, skipped, late, or missed, and edit anytime • Discreet reminders that never reveal what you're tracking unless you choose to • Injection-site rotation with an interactive body map and next-site reminders based on your own log • Vial and inventory tracking so you know what's left • A built-in reference list of compounds for your own record-keeping — for general information only — plus add your own entries SEE YOUR PROGRESS • Weight, body composition, vitals, sleep, hydration, and nutrition • Daily check-ins for mood, energy, sleep quality, and how you feel • Progress photos with side-by-side comparison and charts • Bloodwork and lab tracking with reference ranges over time NATIVE TO YOUR iPHONE • Home Screen and Lock Screen widgets for your next dose • Apple Watch app to view and log doses from your wrist • Control Center, Action Button, and Siri shortcuts to log in a tap • Optional Apple Health sync across weight, body comp, vitals, activity, nutrition, hydration, sleep, and mindful minutes YOURS TO KEEP — OR DELETE • Export a clean PDF or CSV to share with your healthcare provider • Permanently erase all of your data, anytime, with one action • Available in English, Português, and Español PepX is a personal tracking and logging journal. It does not provide medical advice, diagnosis, or treatment, and it does not sell, supply, or recommend any substance. Always consult a qualified healthcare professional before starting, changing, or stopping anything. Download PepX and log your first dose today.
Vialmetry
This app helps you privately track your vials, calculate dosages, log injections, and rotate sites. It offers a local-first logbook with no ads or tracking, and allows for export of your data.
- Record vial details (strength, water, mix date)
- Calculate syringe units and concentration
- Log injections with amount, time, and site
- Rotate subcutaneous injection sites
- Schedule reminders for injections
- Export data as spreadsheet or backup
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Vialmetry is a private logbook for the vials you already have. Record what is in each vial, convert your own numbers into syringe units, log each injection and rotate your sites. Your log stays on your device, works offline and needs no account. BUILT AROUND THE VIAL • Record each vial's strength, the water you added, the date it was mixed, its beyond-use window and what it cost. • See what remains as you log, with every vial kept separate. • Add an optional lot number, source, storage note and comments. ARITHMETIC YOU CAN CHECK • Enter the vial strength, the water you added and the amount you have already decided on. Vialmetry converts it into a syringe mark and shows the concentration, volume and units on screen. • Work backwards from a mark you can read to the water to add. • Every input and unit stays visible, so you can check the working by hand. • Vialmetry never suggests what or how much to take. LOG AND ROTATE • Log an injection in a few taps: amount, time, site and notes. • A front and back body map shows which subcutaneous sites have rested, based on the rest period you set. • Note soreness, redness or other site reactions. • Edit, skip or delete entries. Each vial's remaining amount stays in step with your history. SCHEDULES AND REMINDERS • Record the schedule you follow: daily, every few days, weekly or on chosen weekdays, with optional on and off weeks. • Optional reminders are scheduled by your phone. By default the lock screen shows only "Scheduled reminder". COST • Keep what each vial cost alongside your log and see your spending over time. SUMMARY AND EXPORT • Create a printable summary to share with your healthcare provider. • Export your history as a spreadsheet, or a complete backup file, at any time. PRIVATE BY DESIGN • Local-first. Your log lives on your device. • No ads, no analytics, no tracking. • Optional Face ID or biometric app lock. • Optional private cloud copy for moving your log between your own devices. It is created only when you tap Save to cloud, and you can delete your account in the app at any time. MADE TO BE CALM • Three palettes, light and dark appearance, and a clear, uncluttered layout. IMPORTANT Vialmetry is for personal tracking and educational purposes only. It is not a medical device and does not diagnose, treat, cure, or prevent any medical condition. It does not provide medical advice, diagnosis or treatment. It does not recommend medications, doses or schedules, and it does not determine whether any dose is appropriate. Calculations only convert the numbers you enter; check them yourself. Always consult a licensed healthcare provider. The presence of a substance name in the app is not an endorsement and does not mean the substance is approved for human use. Website and help: https://vialmetry.app Privacy policy: https://vialmetry.app/privacy/ Support: info@vialmetry.app
Screenshots
Verdict
The clearest difference is update cadence: Vialmetry at every 2 days against PepX's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
PepX ships an update every 4 months, Vialmetry every 2 days. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.
| Parameter | PepX | Vialmetry |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 4 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Requires iOS | 16.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 132 MB | 44 MB |
| Age rating | 4+ | 17+ |
| Developer | Vinicius Ramos Pinto | Crestwood Holdings Management LLC |
In-app purchases
PepX
No in-app purchases
Vialmetry
No in-app purchases









