NPK Calculator is a productivity utility for hydroponic and soil-based gardeners to calculate nutrient ratios on iOS.
Product velocity
Maintenance
Daily rank 🇺🇸
—
Productivity
Sentiment
3.3
8 reviews
Nemesis
BudLabs
The App DNA
What makes this app unique?
Users hire the app to prevent fertilizer burn and optimize plant growth through precise macronutrient and micronutrient management, reducing the financial waste of trial-and-error fertilizing.
For Hydroponic and soil-based gardeners who require precise nutrient management to prevent fertilizer burn and optimize plant growth.
Key features
In-app repository of simple and complex fertilizers for nutrient ratio calculation
Pre-configured nutrient schedules developed by experienced growers
Data import functionality for custom fertilizer profiles
Calculates macronutrient and micronutrient balance for hydroponic or soil solutions
How much does it cost?
Fixed-price model at $3.99 USD targets hobbyists seeking a one-time cost for specialized agricultural utility.
Velocity
Maintenance developmentUX improvementsShow more...
The app has released only one update in the last five months, resulting in a cadence of approximately 0.05 releases per week. This frequency falls into the maintenance tier, as there is no evidence of active feature development or live operations. The latest release focused solely on a minor input improvement, suggesting a focus on basic stability rather than growth. Development appears to be in a maintenance state with no recent major feature milestones.
Who built it?
User Sentiment
What do users think recently?
Review voice lately leans frustrated. Users appreciate nutrient management tools help users maintain plant health and prevent nutrient burn during growth.
How are ratings & reviews evolving?
What users say, by theme
- Nutrient management tools help users maintain plant health and prevent nutrient burn during growth
- Application crashes immediately when users attempt to add a new nutrition program to the system
4 of 4 recent reviews analyzed · limited sample
Read the full review analysisUnlock 2 more frustration themes, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for NPK Calculator
How's the Productivity market?
NPK Calculator occupies a narrow utility niche, but its 3.25 rating on 8 total ratings indicates significant friction in the core user experience. The lack of recent feature iteration relative to identification-focused competitors suggests the app is currently in maintenance mode.
Read the market outlookThe rivals identified
By Advanced Nutrients
This is the only direct competitor that focuses specifically on nutrient calculation for plant growth, mirroring this app's core utility.
- Backed by a major fertilizer brand, providing an integrated ecosystem for product-specific nutrient dosing.
- Focuses exclusively on the niche of professional-grade nutrient management rather than general plant care.
- Leverages brand authority to capture users already using their specific nutrient product lines.
Unlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for NPK Calculator
Where is it heading?
The market for plant care is consolidating around identification and journal-based apps, leaving utility-only tools like NPK Calculator exposed to churn. Unless the developer addresses the stability issues and opens the database to custom entries, the app will continue to lose ground to more comprehensive gardening platforms.
- Critical crash-on-input bugs during data entry prevent core utility, which directly correlates with the current negative sentiment trend.
- Non-functional support channels prevent issue resolution, which compounds user frustration and increases the likelihood of negative store ratings.
The SWOT
- Preset nutrition programs reduce novice failure rates
- Brand-agnostic calculation platform avoids vendor lock-in
- Expansion into broader plant health diagnostics
- Integration of community-driven custom nutrient profiles
Next best moves
Rebuild nutrition program entry flow because crash-on-input is the top complaint → restore basic utility
+ 1 more prioritized moveThe counter-intuitive read
The app's brand-agnostic nature is a strategic asset, not a weakness…
Read the full takeFeature gaps
Real-time plant health identification (available in Plantix but absent here) +1
Since the last report: The app's competitive position has declined due to critical stability failures and unresponsive support, forcing a pivot from growth features to technical remediation.
Bottom line
NPK Calculator provides clear utility for nutrient management, but critical stability bugs and unreachable support channels are actively destroying user trust, so the PM must prioritize a stability-first sprint to prevent total churn.
Unlock 3 critical frictions, 3 market threats, 1 more prioritized move and the analyst’s take.
Access the full report for freeReport last updated