Comparison

Hydro Coach vs Oxidation Numbers

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Hydro Coach

This app helps indoor growers manage their hydroponic systems with tools for tracking plant health, monitoring pH and EC levels, and calculating nutrient mixes. It offers light scheduling, smart reminders, and a grower's guide to various systems and terminology.

Highlights
  • Track active and harvested grows
  • Monitor plant health and stress indicators
  • pH and EC level monitoring
  • Nutrient mixing calculations
  • Light scheduling and reminders
  • Smart reminders for system maintenance
  • Hydroponic system guide and glossary
Features
Read full description

Hydro Coach is a practical companion for indoor growers who want healthier plants, clearer guidance, and better consistency in their hydroponic systems. Whether you’re growing leafy greens, herbs, or fruiting crops, Hydro Coach helps you stay organized, dial in your setup, and understand what your plants need at each stage of growth. What you can do with Hydro Coach: Track your grows Log active and harvested grows Monitor start dates, estimated harvest times, and system types Keep everything organized in one place Check plant health Review plant photos and receive clear feedback on visible stress indicators Understand common issues like nutrient imbalance, light stress, and environmental factors pH & EC tools Enter readings to see if you’re within recommended ranges Get guidance based on plant type and hydroponic system Nutrient mixing support Calculate nutrient amounts based on reservoir size Track feed schedules for leafy greens, herbs, and more Light scheduling Set light cycles such as 16/8, 14/10, or custom schedules Create reminders to stay consistent with timing Smart reminders Schedule checks for pH, EC, nutrient changes, reservoir maintenance, and inspections Use quick presets or create your own routines Grower’s guide Compare common hydroponic systems including DWC, NFT, Ebb & Flow, towers, and more Learn terminology with an easy-to-understand glossary Decode common acronyms used in indoor growing Hydro Coach is designed to be clean, calm, and easy to use — whether you’re just getting started or refining an established setup. Some features may require a subscription. Hydro Coach Plus is an optional auto-renewable subscription with monthly and yearly plans. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Oxidation Numbers

Features
Read full description

Oxidation Numbers is a simple and powerful tool designed to help students and chemistry enthusiasts determine oxidation states بسرعة and accurately. Whether you're solving chemical equations, balancing reactions, or studying redox chemistry, this app makes it easy to find oxidation numbers for elements and compounds. Key Features: • Calculate oxidation states instantly • Supports common compounds and elements • Helpful for redox reactions and balancing equations • Clean and easy-to-use interface • Ideal for students, teachers, and chemistry learners • Useful for homework, exams, and quick reference Simplify chemistry concepts and improve your understanding with Oxidation Numbers.

Screenshots

Hydro Coach4 screens
Oxidation Numbers4 screens

Verdict

The call

The clearest difference is in-app purchases: Oxidation Numbers at none against Hydro Coach's 2. Oxidation Numbers also leads on iOS requirement (13.0 vs 15.1). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Hydro Coach sells 2 in-app purchases, starting at $4.99 per month. Oxidation Numbers asks for nothing beyond the download.

Scorecard2 real differences · 7 level
Hydro Coach versus Oxidation Numbers: the parameters behind the verdict, then further details
ParameterHydro CoachOxidation Numbers
PriceFreeFree
Rating5.0 (2 ratings) — better—
Number of ratings2 — better—
Update frequencyEvery 5 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS15.113.0 — better
Further details — not scored
Size145 MB24 MB
Age rating4+4+
DeveloperKisha BakerShraddhaben Parmar

In-app purchases

2 purchases

Hydro Coach

Subscriptions2
  • Hydro Coach Plus7 Days trial$4.991 Month
  • Hydro Coach Plus7 Days trial$39.991 Year
None

Oxidation Numbers

No in-app purchases

Questions

Is Hydro Coach free?
Hydro Coach is free to download, with in-app purchases available.
Is Oxidation Numbers free?
Oxidation Numbers is free to download, with no in-app purchases.
Do Hydro Coach or Oxidation Numbers have ads?
Neither Hydro Coach nor Oxidation Numbers shows ads.

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