Written by the team behind HeySis, one of the apps discussed. This comparison is based on official feature documentation.
HeySis core features will always remain free. Premium is optional and unlocks additional features.
HeySis combines a free doctor PDF and calendar screenshot import with a $24.99 US annual plan. Clue’s explicitly labelled US annual plan is $39.99, with custom tracking, wearable integrations and additional modes. Choose around your routine and check feature availability before paying.
Prices and subscriptions
US App Store · USD · checked September 12, 2026
HeySis
Core features · always free
$0
Optional Premium
$24.99 / year
Monthly Premium: $5.99/month. It unlocks more AI messages, deeper insights and additional features.
Core features will always remain free. Annual Premium works out at about $2.08/month, billed yearly. The $17.99/year offer has separate eligibility.
Clue
Basic cycle tracking · free
$0
Optional Plus
$39.99 / year
$9.99 monthly · about $3.33/month with annual billing.
Prices for explicitly named 1-month and 1-year products in the US store. Offers may differ.
The compared trackers offer basic tracking without a subscription. Prices vary by country, account and offer. Annual plans are paid upfront; monthly equivalents are calculations, not monthly billing.
Feature comparison at a glance
Availability and plan conditions matter as much as the feature itself.
| Feature | HeySis | Clue |
|---|---|---|
| Period diary | Always free · basic period, symptom and mood tracking | Free · basic tracking and predictions |
| Assistant | AI chat with a free limit; Premium raises the limit | Chat With Your Data · limited Clue Plus beta, US/English |
| Doctor report | Free · generated on the phone, excludes AI chats | Plus / separate purchase · region and language limits |
| Bring your history | Calendar screenshot recognition on iPhone; separate Health import | Past entries can be added. Direct import of another tracker’s files is not supported |
| Sharing with a partner | Circle invites and basic status are free; deeper member insights are Premium | Clue Connect is included in Clue Plus |
| Privacy choices | On-device diary; AI, sync and Circle are separate online choices | Granular consent settings; published EU data-protection commitments |
| Devices | iPhone · iOS 26+; permission-based Apple Health integration | iOS and Android; multiple wearable integrations in Plus |
| Pregnancy | Weekly information and logs; selected illustrations and weight analytics are Premium | Pregnancy tracking with premium features in Plus |
| Paid extras | More AI messages, insights, article library and selected Circle features | Advanced analysis, custom tags, content and additional modes |
Sources for prices and features: HeySis · App Store US · Clue · App Store US · Clue · Plus features · Clue · Importing another tracker · Clue · Chat With Your Data · Clue · Doctor report · Clue · Switching and privacy · HeySis
Where each tracker has an advantage
HeySis costs $15 less per year than the listed $39.99 Clue plan, and its doctor report is free. Clue offers detailed custom tracking, multiple wearable integrations and dedicated life-stage modes. Promotions can change the price comparison.
HeySis or Clue: which routine matters to you?
HeySis is worth trying when you want a short daily diary, a free doctor PDF and a practical way to move logged dates from calendar screenshots. Clue is a strong candidate when custom tracking categories, a broader wearable ecosystem or specific life-stage modes matter more.
For US annual plans listed with explicit periods, HeySis is $24.99 and Clue is $39.99: a $15 difference before offers. That difference is useful only if the included features meet your needs. Start with the free basics and compare the recurring cost of the plan you would actually choose.
Moving old dates: screenshots versus fast manual entry
Clue’s switching guide addresses the fear of starting over by asking for your last three period dates through fast tracking. Its support team says direct import of another tracker’s exported files is not supported. This can be sufficient when you only want to establish a recent baseline.
HeySis gives you another route when you want more visible calendar history: choose up to four screenshots at a time, recognize logged period days on the iPhone and review the results. It does not transfer a complete account, symptoms or all notes. Supported Apple Health records can be imported separately. Neither app’s quick start means your older records should be discarded.
Doctor PDF and a diary you can keep up with
HeySis creates a doctor report without a subscription: up to six recent cycles, symptom timing and a recent diary overview. AI chats are left out. The point is to turn entries you already made into something you can review and choose to share at an appointment.
Clue also documents a doctor report, included with Plus or available through a separate purchase, with rollout restrictions by region and language. Check your account before paying specifically for it. In the reviews below, Mari_chug values the HeySis PDF; Clara J- describes minute-long bedtime logs. Together they illustrate the full routine: make records regularly, then use them later.
Partner, friends and AI: compare access, not just checkmarks
HeySis Circle includes free invitations and basic status sharing with chosen people. Deeper member insights and selected interactions require Premium, while an invited companion does not need their own paid subscription to join. Clue Connect shares cycle details with a partner, friend or family member through Clue Plus. Both have sharing; the free starting point differs.
Both also document conversational support. HeySis has an AI assistant with a free allowance and a higher Premium limit. Clue’s Chat With Your Data is a limited US, English-language Plus beta at the date checked. Availability, language and the context sent for a reply are more useful distinctions than a blanket “AI: yes/no.”
When Clue may fit better
Clue Plus documents custom tags, calendar filters, extra analysis and connections to multiple wearables. If your priority is tracking your own categories or using data from devices such as Oura, investigate those integrations first. HeySis’s documented Health integration should not be mistaken for direct support of every wearable.
Clue also emphasizes science, European data protection and dedicated life-stage experiences. HeySis’s different starting point is an on-device diary with optional online AI, sync and Circle. Read how those choices work rather than assuming that a softer visual design makes an app more private or more accurate.
Sources and review
Checked September 12, 2026. Prices, regions, plans and feature rollouts can change. We do not label a feature absent just because a source does not mention it.
- Clue · Chat With Your Data
- Clue · Importing another tracker
- Clue · Doctor report
- Clue: Clue Connect
- Clue: app and supported platforms
- HeySis on the App Store
- Clue · Switching and privacy
- HeySis · App Store US
- Clue · App Store US
- Clue · Plus features
- HeySis: product facts and editorial approach
- HeySis: privacy policy