Caya Studio vs Rheii
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Caya Studio
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Download the official Caya Studio app today! View class schedules, purchase class packages and pay for invoices. Optimize your time and maximize the convenience from your phone. Download today! Be sure to check out our website at: https://cayastudiosg.com
Rheii
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We all hold a vision of who we want to become. But it's hard to grow when you can't see your own patterns. Rheii is a journal that acts as a mirror to yourself, so you can finally see what's shaping you over time. The person you're becoming shouldn't be just a feeling, but something you can actually see. Simply dump your thoughts, and let Rheii handle the rest. 1. Recurring Themes — See the patterns you keep returning to, and what they're telling you about yourself. 2. Your Life in Motion — Watch where things are growing, easing, or demanding your attention. 3. Life Domains — Explore how different areas of your life intertwine and impact one another, across Work, Relationships, Self & Identity, and your Energy. 4. Your own Growth Garden — Receive personalized suggestions for new habits, goals, or ideas. Set intentions, complete activities, and build your growth garden. 5. Personalized Prompts & Weekly Summaries — Peviews of your week and daily prompts that get you thinking in new ways. Rheii is for those ready to close the gap between where they are and where they want to be. You already know more than you think! Rheii is designed for adults aged 18 and over. Rheii uses AI to support reflection, journaling, and personal growth. AI-generated responses can be inaccurate or incomplete and should not be treated as professional advice. Rheii is not a medical service and does not provide medical, mental-health, psychological, or diagnostic advice. Using Rheii does not create a therapist–client, doctor–patient, or other professional relationship. Do not use Rheii as a substitute for qualified care, and do not delay seeking professional support because of anything shared in the app. Rheii is not for emergencies or crisis support. If you may be in immediate danger, are considering harming yourself or someone else, or need urgent help, contact local emergency services or a qualified crisis-support provider right away.
Screenshots
Verdict
The clearest difference is update cadence: Rheii at every 5 days against Caya Studio's every 2 weeks. Caya Studio's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Caya Studio ships an update every 2 weeks, Rheii every 5 days. The most recent releases landed on October 10, 2026 and October 5, 2026 respectively.
| Parameter | Caya Studio | Rheii |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 74 MB | 26 MB |
| Age rating | 4+ | 17+ |
| Developer | Caya studios pte ltd | Hye Jin Kwon |
In-app purchases
Caya Studio
No in-app purchases
Rheii
No in-app purchases









