Mars Hydro vs GrowDiary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mars Hydro
Control your smart grow system with this app. Manage LED lights, ventilation, and monitor environmental data like CO2, temperature, and humidity for optimal plant growth. Automate your entire grow kit to mimic natural conditions.
- LED light control with timers and simulation
- Ventilation system management
- Complete grow kit automation via iHub
- Environmental data monitoring (CO2, temp, humidity, PPFD)
- Sunrise and sunset simulation
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The Mars Pro app is launched for a new intelligent control system your smart grow system and data monitoring, which includes the marhydro led grow light,inline fan,iHub. Welcome to experience the upgraded version through our website: www.mars-hydro.com Advanced Features: • LED Control: Manage your LED lights with ease, featuring on/off switches, timers, sunrise and sunset simulation, and PPFD (Photosynthetic Photon Flux Density) detection for optimal light management. • Ventilation System Control: Equipments can be controlled with timers, on/off switches, schedules, and cycles to maintain perfect air circulation. • Complete Automation: Use the iHub to program your entire grow kit, setting up automation programs that mimic natural environment grows. • Comprehensive Environmental Data: Monitor and store vital growing environment data, including CO2 levels, temperature, humidity, and PPFD, ensuring you have all the information needed for a successful grow.
GrowDiary
Easily document plant cultivation cycles, track progress, and share experiences with a large community. Access a vast library of grow diaries for insights and learn new techniques. Connect with seed breeders and nutrient companies.
- Document grow cycles
- Track plant progress
- Share experiences
- Access grow diary library
- Engage in forums
- Connect with industry reps
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GrowDiaries is your all-in-one plant cultivation app, designed to empower growers of all levels. Easily document your grow cycles, track progress, and share your experiences with a vibrant community of over 350,000 enthusiasts worldwide. Access a vast library of over 90,000 grow diaries to gain insights, learn new techniques, and improve your yields. Engage in forums, participate in contests, and connect with official representatives from leading seed breeders and nutrient companies. Whether you're a beginner or a seasoned cultivator, GrowDiaries provides the tools and community support to elevate your growing journey.
Screenshots
Verdict
The clearest difference is review sentiment: GrowDiary at 100% against Mars Hydro's 27%. GrowDiary also leads on rating (4.5 vs 2.6) and update cadence (every 9 days vs every 2 months). Mars Hydro's advantage is ads (none vs shown) and ratings volume (34 vs 2). On price, in-app purchases, device support and iOS requirement 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.
GrowDiary holds the better App Store score, 4.5 against 2.6. That said, the two scores are not equally well evidenced: Mars Hydro has 34 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 27% of Mars Hydro's written reviews are positive against 100% of GrowDiary's.
Mars Hydro ships an update every 2 months, GrowDiary every 9 days. Both last shipped on November 4, 2026.
| Parameter | Mars Hydro | GrowDiary |
|---|---|---|
| Price | Free | Free |
| Rating | 2.6 (34 ratings) | 4.5 (2 ratings) — better |
| Positive reviews | 26.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 34 — better | 2 |
| Update frequency | Every 2 months | Every 9 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 52 MB | 52 MB |
| Age rating | 4+ | 17+ |
| Developer | MARS TRADING RCC, INC. | GrowD soft s.r.o. |
Customer experience
Mars Hydro
GrowDiary
In-app purchases
Mars Hydro
No in-app purchases
GrowDiary
No in-app purchases
