PeptideFox vs Vialy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PeptideFox
This app simplifies peptide math and tracking for users managing peptide protocols. It calculates precise dosages, logs daily injections, and helps build custom protocols. Manage vial inventory and track multiple peptides simultaneously for optimal results.
- Reconstitution calculator
- Daily dose and injection log
- Custom protocol management
- Vial inventory tracking
- Supports various peptide compounds
- Private and secure data storage
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RECONSTITUTION CALCULATOR — MATH-FREE Simply enter your vial size and desired dose. The calculator solves the optimal amount of BAC water and gives you the exact syringe draw. Supports mg, mcg, IU, and all standard insulin syringe formats. No more guessing your reconstitution math. DAILY DOSE TRACKER & INJECTION LOG Log every injection by time of day — waking, morning, evening, bedtime. Mark doses complete with one tap. See your full dosing history and protocol at a glance. Never miss a dose again. PROTOCOL MANAGEMENT & PEPTIDE STACK BUILDER Build custom protocols for any compound. Set frequency, duration, and dosing schedule. Track multiple peptides simultaneously and manage your full peptide stack without confusion. VIAL INVENTORY Know exactly how many doses remain in each vial. Track reconstitution dates, keep multiple vials per compound, and switch to a fresh vial without losing count. Never waste a vial again. WORKS WITH EVERY PEPTIDE & GLP-1 COMPOUND Whether you're managing a GLP-1 protocol, peptide cocktails like GLOW or KLOW, or a full biohacker peptide stack, compound-aware support is built in. BUILT FOR THE PEPTIDE COMMUNITY PeptideFox understands the real-life scenarios of compound reconstitution, injection tracking, and managing multiple vials and supply — the calculator, tracker, and inventory all work from the same data, so nothing needs entering twice. PRIVATE & SECURE All data stays on your device. No account required. No cloud. No trackigs to you. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/
Vialy
This app helps adults using prescribed peptides track their doses, manage protocols, and log injections. It calculates concentrations and units, plans injection schedules, and tracks vial usage. A reference library and dose reminders are included.
- Live dose and concentration calculation
- Customizable protocol planning
- Body map injection logging
- Vial usage and cost tracking
- Built-in peptide reference library
- Dose reminders
- Data export (JSON/CSV)
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Vialy is a personal tracking and calculator tool for adults using prescribed peptides. It handles the math so you do not have to. Free. No ads. No subscriptions. No in-app purchases. RECONSTITUTE WITH CONFIDENCE Scrub the BAC water amount and watch the dose, the concentration, and the syringe units update live. No more squinting at a calculator app between hand washes. PLAN YOUR PROTOCOL Build phases with custom durations, scheduled days (daily, 5-on-2-off, weekly, or anything custom), dose in milligrams, multiple dose times per day, and a grace window for missed doses. Vialy keeps track of where you are in the protocol and what is next. LOG INJECTIONS Tap to log a dose from a body map. Vialy remembers each site you have used and warms up the map with halos so rotation becomes automatic. No spreadsheet required. TRACK YOUR VIALS Each vial shows the doses remaining, the estimated days until empty, and the cost. Plan-backed vials are sorted by soonest-empty first; as-needed vials get their own simpler view. Archive a vial when it is retired and the stats stay with it. PEPTIDE REFERENCE LIBRARY A built-in catalog of common peptides with mechanism notes, half-life, storage guidance, common side effects, and contraindications. This information is for context only and is not medical advice. DOSE REMINDERS Optional local notifications at your scheduled dose times, plus a heads-up when a vial is running low so you have time to reorder. EXPORT YOUR DATA JSON or CSV from Settings, anytime. Your data is yours. PRIVATE BY DESIGN - Sign in with Apple only - no passwords, no third-party logins - No tracking, no analytics, no advertising - No HealthKit access, no location, no camera, no contacts - Account deletion is one tap; your data is removed from our servers IMPORTANT Vialy is not a medical device and does not provide medical advice. It does not replace your clinician. All doses are entered by you for personal reference only. Always follow the guidance of a licensed clinician who has prescribed your protocol.
Screenshots
Verdict
The clearest difference is in-app purchases: Vialy at none against PeptideFox's 2. Vialy also leads on update cadence (every 2 days vs weekly). On price, rating, review sentiment and ratings volume 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. PeptideFox sells 2 in-app purchases, starting at $2.99 per month. Vialy asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for PeptideFox against 5.0 for Vialy. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
PeptideFox ships an update weekly, Vialy every 2 days. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.
| Parameter | PeptideFox | Vialy |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 3 — better | 2 |
| Update frequency | Weekly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 14 MB | 15 MB |
| Age rating | 17+ | 17+ |
| Developer | HZ29 Inc. | Lunium AB |
Customer experience
PeptideFox
Vialy
In-app purchases
PeptideFox
- Pro Monthly3 Days trial$2.991 Month
- Pro Yearly3 Days trial$19.991 Year
Vialy
No in-app purchases








