Mars Hydro vs Nitrify
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.
Nitrify
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Your test kit gives you numbers. Nitrify tells you what they mean. Log ammonia, nitrite and nitrate, and Nitrify reads where your tank is in the cycle, whether the water's safe, and what's changed since last time. Made for freshwater keepers who want an answer, not just a spreadsheet. Know your cycle. Every test gets a stage: waiting on ammonia, the nitrite spike, finishing, or fully cycled. Pro reads your own trend to estimate when it'll finish. Know if it's safe. A plain Safe, Watch or Act call on every reading. Pro breaks down ammonia, nitrite, nitrate, pH, GH, KH and phosphate against their target ranges, and warns you when one drifts the wrong way. Stay on top of upkeep. Water changes, filter cleans, plant trims and dosing, all in one log. Pro adds reminders, custom schedules, and a dilution preview that shows what a 30% change does to your nitrate. Your tanks, your data. Multiple tanks with Pro, a photo journal, a Home-Screen widget and CSV export, all synced over iCloud with no account and nothing sent to a server. Full light and dark mode. Pay once. Free covers logging, your cycle stage, the safety verdict, one tank and iCloud sync. Nitrify Pro is a single one-time unlock. No subscription, no ads. Nitrify reads your water against general freshwater ranges to guide you; it isn't a diagnosis of your tank or livestock. During a cycle, high ammonia and nitrite are normal, and the app tells you so.
Screenshots
Verdict
The clearest difference is in-app purchases: Mars Hydro at none against Nitrify's 1. Mars Hydro also leads on iOS requirement (15.0 vs 26.2). On price, update cadence, ads and device support 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. Nitrify sells 1 one-off in-app purchase. Mars Hydro asks for nothing beyond the download.
Mars Hydro ships an update every 2 months, Nitrify every 6 weeks. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.
| Parameter | Mars Hydro | Nitrify |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (35 ratings) — better | — |
| Positive reviews | 26.9% of reviews | — |
| Number of ratings | 35 — better | — |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 52 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | MARS TRADING RCC, INC. | Charith Perera |
In-app purchases
Mars Hydro
No in-app purchases
Nitrify
- Nitrify Pro$6.99









