Grau vs Cosia
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Grau
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The Grau app is the easiest and most intuitive way to control your Grau luminaires. At the tap of a finger, you can create and program ideal light settings for every mood, space, time and situation. Program and group your lamps in one view: The Grau app lets you see all your Grau lamps in one view, build lamp groups, and program both individual and group settings. With a tap or slide of your finger, you can switch lamps on and off, adjust brightness, and tune color temperature. Create and name groups according to room or situation, and coordinate dimming, color, and temperature settings. Program your lamps via gallery view: For visual control of your lighting, take a picture of your lamp(s) and room(s), save in the Gallery, and integrate luminaire control in the photo(s). Create and time-set light settings and scenes: Use the Grau app to program and save light scenarios for every mood and situation. Set the light right for working, meeting, dining or downtime and save the settings as a scene. Then simply select the scene you need with one tap. Grau timer function lets you configure lamps and lighting scenes according to time, date, or sunrise / sunset. Share your light network and lighting control: Grau has four different levels of sharing and access control. You can decide if your network is open to everyone, or if others need a password to access. If you have several users and devices using the same network, all changes made with one device will be automatically updated to the other devices via the Grau cloud service.
Cosia
This app offers personalized health insights for women by analyzing cycle, sleep, energy, and mood data. It helps users understand their unique body patterns and provides evidence-informed explanations about women's health.
- Personalized cycle insights beyond dates
- Pattern recognition across health data
- Customized guidance based on user data
- Evidence-informed women's health education
- Clean interface for tracking what matters
- Data privacy with GDPR standards
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What you can do with Cosia: • Track your cycle Log your period, symptoms, mood, sleep, and energy in one place - no more guessing where you are in your cycle. • Understand your phases Get clear insights into your follicular, ovulatory, luteal, and menstrual phases - what's happening physically, emotionally, and mentally at each stage. • Sync nutrition & movement to your cycle Get phase-based recommendations for food and movement that work with your body's natural rhythm, not against it. • Spot your own patterns See trends across cycles so you can recognise what's normal for you. • Learn as you go Access clear, science-backed information about periods, ovulation, hormones, and women’s health - all explained in simple, easy-to-understand language. Why we built Cosia: Women's health has been under-researched, oversimplified, and often ignored. We believe you deserve better than period predictions that don't match your reality or wellness tips that could apply to anyone. Cosia is for every woman who's ever thought "something is going on with my body and I wish I understood it." Whether you're new to tracking or you've been logging data for years, Cosia helps you make sense of it. Your data, protected Your health data is deeply personal, and we treat it that way. Cosia is built and operated in Germany under strict GDPR standards. We don't sell your data. We don't share it with advertisers. It belongs to you, full stop. Built with women, for women Cosia is independent, women-led, and built in Berlin. We're a small team who cares, and we're only getting started. Subscription details Cosia Pro Available as a monthly or annual auto-renewing subscription. • Monthly subscription: €6.99 per month in Germany • Annual subscription: €59.99 per year in Germany Prices may vary by country or region and are shown in the app before purchase. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://cosiaapp.com/privacy-policy Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions in your Apple ID account settings after purchase. Have feedback or questions? We'd love to hear from you: support@cosiaapp.com
Screenshots
Verdict
The clearest difference is in-app purchases: Grau at none against Cosia's 4. Grau also leads on device support (4 vs 2) and iOS requirement (13.0 vs 15.0). Cosia's advantage is update cadence (every 3 weeks vs every 3 months). On price and ads 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. Cosia sells 2 in-app purchases, starting at $5.99 per month. Grau asks for nothing beyond the download.
Grau ships an update every 3 months, Cosia every 3 weeks. The most recent releases landed on October 14, 2026 and October 8, 2026 respectively.
| Parameter | Grau | Cosia |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 33 MB | 80 MB |
| Age rating | 4+ | 9+ |
| Developer | Grau GmbH | MEK Cosia GmbH |
In-app purchases
Grau
No in-app purchases
Cosia
- Pro Subscription Monthly2 Months trial2 variants$5.991 Month
- Pro Subscription Yearly2 Months trial2 variants$49.991 Year









