Peptide Tracker vs E1RM Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Peptide Tracker
Calculate peptide dosages and reconstitution accurately and quickly. Track your injections with timely reminders and live activities. Save custom formulas and sync across devices for seamless management.
- Peptide dosage calculation
- Reconstitution guidance
- Injection time tracking
- Custom formula saving
- Widget for daily doses
- Reminders and Live Activities
- iCloud sync across devices
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Track your peptide routines with a clear dose log, flexible schedules and reminders. PepFlow keeps your protocols and history together so you can see what is next and review what you have recorded. Keep your routine on track - Manage protocols for injections, injectable pens, oral medications, nasal sprays and topical products. - Save preparation details for your peptides for easy reference. - Keep separate schedules and reminders for each protocol. - Record doses and review your history. - See upcoming and recorded doses in the calendar. - Check your schedule with widgets and Live Activities. - Sync your protocols and tracking history across iPhone and iPad with iCloud. - Add scheduled doses to Apple Calendar and Reminders. Consult a healthcare professional before making medical decisions. PepFlow PRO Some features require a PepFlow PRO purchase. Payments are handled through your Apple Account. Subscriptions renew automatically unless auto-renewal is turned off at least 24 hours before the current period ends. Your account is charged for renewal within 24 hours before the current period ends. Manage subscriptions in your Apple Account settings. Lifetime purchases are a one-time payment and do not renew. Questions or feedback? Contact hi@pepflow.app Terms of Service: https://pepflow.app/terms-of-service/ Privacy Policy: https://pepflow.app/privacy-policy/
E1RM Calculator
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E1RM Calculator is a powerful training tool for strength athletes. Using the scientifically-backed RPE (Rate of Perceived Exertion) method developed by Mike Tuchscherer and popularised by Barbell Medicine, it gives you accurate one rep max estimates and helps you plan complete training sessions. CALCULATE YOUR 1RM Enter the weight you lifted, the number of reps, and how hard it felt on the RPE scale. The app instantly estimates your one rep max using a precise lookup table that accounts for both rep count and perceived exertion. TRAINING PERCENTAGES See your estimated working weights at 95%, 90%, 85%, 80%, 75%, 70%, 65%, and 60% of your 1RM at a glance. Use the custom percentage calculator to find the weight for any percentage you need. SETS PLANNER Plan your full training session before you walk into the gym. Configure your opening set, then add follow-up sets using RPE targets, percentage reductions or increases, or specific weights. Generate your complete session and copy it to your clipboard to share or reference during training. FLEXIBLE SETTINGS Choose between kg and lbs. Configure weight rounding to match your available plates — round to the nearest 0.5 or 2.5, and choose whether to round up, down, or to the nearest increment. SIMPLE AND FOCUSED No account required. No ads. Works completely offline. Your settings are saved locally on your device.
Screenshots
Verdict
Peptide Tracker and E1RM Calculator are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Peptide Tracker sells 11 in-app purchases, starting at $0.99 per 7 days and E1RM Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Peptide Tracker ships an update fortnightly, E1RM Calculator every 8 days. Both last shipped on October 28, 2026.
| Parameter | Peptide Tracker | E1RM Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (439 ratings) — better | — |
| Positive reviews | 79.3% of reviews | — |
| Number of ratings | 439 — better | — |
| Update frequency | Fortnightly | Every 8 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 17.0 — better |
| Further details — not scored | ||
| Size | 181 MB | 0 MB |
| Age rating | 4+ | 4+ |
| Developer | keinois OU | Paul Walsh |
In-app purchases
Peptide Tracker
- PepFlow PRO (Weekly)3 Days trial$0.997 Days
- PepFlow PRO (Monthly)3 Days trial$2.991 Month
- PepFlow PRO (Weekly)3 Days trial$2.997 Days
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- Peptide PRO (Weekly)3 Days trial2 variants$2.997 Days
- PepFlow PRO (Weekly)3 Days trial3 variants$3.997 Days
- PepFlow PRO (Annual)3 Days trial$8.991 Year
- PepFlow PRO (Monthly)3 Days trial2 variants$9.991 Month
- Peptide PRO (Annual)3 Days trial$14.991 Year
- Peptide PRO (Annual)3 Days trial$19.991 Year
- PepFlow PRO (Annual)3 Days trial2 variants$29.991 Year
- Peptide PRO (Annual)3 Days trial$44.991 Year
E1RM Calculator
- Support Developer$1.99
Questions
Is Peptide Tracker free?
Is E1RM Calculator free?
Do Peptide Tracker or E1RM Calculator have ads?
Which is updated more often, Peptide Tracker or E1RM Calculator?
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