Best Npk Calculator Apps

213+ iOS apps curated and reviewed

4.6 avg rating
15 free apps
Updated June 2026

Out of 213+ npk calculator apps on iOS, 15 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.

Compare top Npk Calculator Apps (June 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Agri CalculatorAgri CalculatorFreeNoYesMay 2026
2NPK CalculatorNPK Calculator$2.99 was $3.993.3★ (8)NoNoSep 2026
3Calculator with History +Calculator with History +Free4.7★ (25K)NoYesSep 2026
4Calculator₊Calculator₊Free4.7★ (1.7M)YesYesSep 2026
5Color Calculator-smart&cuteColor Calculator-smart&cuteFree4.7★ (16K)YesYesSep 2026
6Graphing Calculator Plus AIGraphing Calculator Plus AI$5.994.6★ (12K)NoYesSep 2026
7Calculator for iPad₊Calculator for iPad₊Free4.5★ (126K)YesYesSep 2026
8Calculator⁼Calculator⁼Free4.6★ (358K)YesYesSep 2026

Top Picks for Npk Calculator

NPK Calculator#2

NPK Calculator by Anton Simonov

Strong Contender
📊 Productivity
3.3(8 ratings)
$2.99
NPK Calculator screenshot 1
NPK Calculator screenshot 2
NPK Calculator screenshot 3

This app helps optimize fertilizer solutions for plants by calculating the correct ratios of macronutrients and micronutrients. It aims to save money, prevent nutrient imbalances, and improve nutrient uptake for healthier plant growth in hydroponics or soil.

Calculator with History +#3

Calculator with History + by Beijing Free Calculator Technology Co., Ltd.

No ads & Scientific calculator
Worth Considering
💰 Finance
4.7😊(25K ratings)
FreeIn-App Purchases
Calculator with History + screenshot 1
Calculator with History + screenshot 2
Calculator with History + screenshot 3
Calculator with History + screenshot 4
Calculator with History + screenshot 5
Calculator with History + screenshot 6

This free calculator app offers a fast, ad-free experience with a visual input and calculation history. Customize your experience with various keyboard sounds and colors, and access advanced scientific functions when needed.

What We Love

  • 🚀 Great calculator with history
  • 👍 Easy to use interface
  • 🚀 Responsive and fast
  • 🔒 No ads or subscriptions

Room to Improve

  • 🐛 History deletion issues
  • 🐛 Delayed equal button press
  • 🐛 Calculation errors with certain functions

More Npk Calculator apps to explore

FAQ about Npk Calculator

Are there free npk calculator apps for iPhone?
Yes — 15 of the top npk calculator apps we rank are free to download, including Agri Calculator and Calculator with History +.
Agri Calculator has no ads and offers in-app purchases, according to its App Store listing as of June 2026.
We track 213+ npk calculator apps on the iOS App Store as of June 2026, ranked by rating, recency, and analysis of real user reviews.