Polypep vs FastKept
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Polypep
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Keep your peptide dose log, vial inventory and protocol schedules together with Polypep. Track your routines and explore educational reference material in one place. LOG EVERY DOSE Record the peptide, amount, injection site and time. Review doses, notes, side effects and biomarker readings on your Journey timeline. KNOW YOUR STOCK Track vials and powder lots, record reconstitution and see how long your supply may last. Logging a dose updates the vial it came from. ORGANIZE YOUR PROTOCOLS Use a preset or create your own protocol. See your planned doses in daily, weekly and monthly schedules, with reminders and a history you can backfill. LEARN AND FOLLOW TRENDS Browse peptide reference cards and guides covering reconstitution, storage, syringe units and bloodwork. Log biomarkers and view their trends alongside your records. Educational reference only. OPTIONAL ACCOUNT AND COACH Use the app without an account, or sign in to sync your personal records privately across your own devices. Browse and share community protocol recipes. Ultimate adds Coach, an optional AI assistant for educational arithmetic, stock checks and organizing records. You control which tools it can use. When you use Coach, your messages and results from enabled tools are sent to a third-party AI provider. Writes ask for approval by default. FREE, PRO AND ULTIMATE Free includes dose logging, catalog browsing and one active protocol. Pro adds stock, custom peptides and protocols, unlimited active protocols, full reference entries, guides, schedules, Journey, biomarkers and side-effect logging. Ultimate includes Pro and Coach. EDUCATIONAL ONLY Polypep does not provide medical advice, diagnosis or treatment. Many compounds referenced are research chemicals or prescription-only medicines. Consult a licensed clinician before starting, changing or stopping any compound. Paid subscriptions renew until cancelled and are managed through your App Store account. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://getpolypep.com/legal
FastKept
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Track your fasts with a clear timer and a plan that fits your week. What makes FastKept different? โข Every feature is completely free. No paywalls and no locked features. โข Home Screen widgets show the live clock under "Fasting". The medium widget also shows the goal end time, with wording such as "Your goal is 16 hours, so you're done at 12:58 PM." Lock Screen widgets show your running time and goal progress. โข Choose a weekday schedule with rest days, keep notes and mood with each fast, and export and restore your history through Files without an account. Everything is free. The only thing you can ever pay for is removing ads for other Solstice Suite apps. Choose a preset or a custom length, start and end a fast, and review week, month, and rolling range history. Keep optional water, weight, and mood logs. Set reminders and use a Live Activity while a fast is running. Privacy Fasts and logs stay on your iPhone unless you export them, enable the relevant Apple Health sharing, or choose an account backup. Local photos and records from Apple Health are excluded from online backups. This is a timer and journal, not medical advice; it does not measure ketosis or diagnose fasting stages. Optional supporter plans are billed by Apple through your App Store account, and the app checks subscription status with our purchase provider using purchase information and technical information. We do not send your personal app records to it. Crash and performance diagnostics help us fix problems; they exclude your identity, screenshots, and view attachments. Optional ad removal Removes ads in all our apps on this device. Choose $0.99 weekly, $2.99 monthly, or $19.99 yearly in the U.S.; local prices may vary. All features remain free. Payment is charged to your Apple Account at confirmation. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends. Manage or cancel in your Apple Account subscription settings. Deleting the app does not cancel a subscription. Support: support@solsticesuiteapps.com Privacy: https://fastkept.com/privacy/ Terms: https://fastkept.com/terms/ Part of Solstice Suite. All features free. No account needed.
Screenshots
Verdict
The clearest difference is ads: FastKept at none against Polypep's shown. Polypep's advantage is update cadence (every 3 days vs every 10 days). On price, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Polypep sells 4 in-app purchases, starting at $6.99 per month and FastKept sells 3 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Polypep ships an update every 3 days, FastKept every 10 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.
| Parameter | Polypep | FastKept |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 3 days โ better | Every 10 days |
| Ads | Yes | No โ better |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad โ better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details โ not scored | ||
| Size | 71 MB | 17 MB |
| Age rating | 12+ | 4+ |
| Developer | Dal Rupnik | Timothy Hess |
In-app purchases
Polypep
- Pro Monthly3 Days trial$6.991 Month
- Ultimate Monthly3 Days trial$14.991 Month
- Pro Yearly7 Days trial$49.991 Year
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- Ultimate Yearly7 Days trial$99.991 Year
FastKept
- Ad-free Supporter Weekly$0.997 Days
- Ad-free Supporter Monthly$2.991 Month
- Ad-free Supporter Yearly$19.991 Year









