An honest comparison
Hormone-Smart Rhythm vs FastSyncer
Both tools change your fasting hours with your cycle or menopause stage instead of one fixed window every day. The real differences are how you use them and who you can talk to.
| Hormone-Smart Rhythm | FastSyncer | |
|---|---|---|
| Format | Works in any web browser — nothing to download. Members can print the 30-day calendar or save it as a PDF for the fridge | A phone app (Apple App Store) with a live fasting timer |
| Trying it out | Today's fasting range and cycle phase free, no account — your answers never leave your browser | Free download; basic fasting tracker is free |
| Price | $4.99/month or $49.99/year (two months free), shown up front | Full hormone-synced plan is a paid membership; price not shown on the public pages we checked |
| Life stages | Regular cycles, perimenopause and irregular cycles, and no periods (menopause and post-menopause) | Tracks for regular and irregular cycles, perimenopause and menopause |
| Day-to-day style | A fasting range for each day (for example 15–17 hours) plus a nourishment focus — the shorter end counts | One target number of hours per day, with food guidance, streaks, medals and monthly challenges |
| Health conditions | Survey asks about thyroid, chronic fatigue, type 2 diabetes, autoimmune conditions and medication taken with food, and adjusts the plan or advises against fasting | General advice to speak to a doctor if pregnant, breastfeeding or managing a condition |
| Human support | Message Samantha Linden, MEd, DBA, directly — she answers every message herself within 48 hours | A community of women doing the challenges together |
Based on FastSyncer's public website as of October 2026. If something changes, tell us and we'll update this page.
Common questions
Which is better if I'm in perimenopause or menopause?
Both cover these stages. Hormone-Smart Rhythm is built around women in their late 30s to 60s, and gives you a gentle range each day rather than one target — on hard days the shorter end is the plan. If you like a phone timer and streaks, FastSyncer may suit you; if you prefer a calendar you can print and a real person to ask, Hormone-Smart Rhythm may fit better.
Do I need to download an app?
No. Hormone-Smart Rhythm runs in your web browser on any phone, tablet or computer, and members can print the whole month.
Is Hormone-Smart Rhythm free to try?
Yes. The survey and your first result — today's fasting range and your cycle phase — need no account and no card. Membership adds the full 30-day printable calendar, saving across devices, realignment when your period date changes, and messaging with Samantha.