Comparison

Spill Calc vs Zerosec Note

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

Head to head
About

Spill Calc

This app provides rapid, dependable spill volume estimations for field professionals. It calculates liquid volumes across various shapes and ground conditions, supporting mixed fluids and tank displacement for accurate reporting.

Highlights
  • Fast spill volume calculations
  • Multiple spill types supported
  • Mixed fluid calculations
  • Tank displacement accounting
  • Section-based spill tracking
  • Save and organize spill history
  • Export reports via text or email
Features
Read full description

Spill Calc Pro is your all-in-one mobile tool for fast, reliable spill volume estimates — built for real-world field use. Designed for oil & gas professionals, environmental responders, and site managers, it helps you quickly calculate liquid spill volumes across multiple shapes and ground conditions. Key Features: Fast Calculations – Enter dimensions and get instant results in barrels and gallons Multiple Spill Types – Standing liquid, saturated soil, and contained areas Mixed Fluid Support – Calculate oil and water splits with ease Tank Displacement – Account for equipment inside containment areas Section-Based Tracking – Break spills into multiple sections for accuracy Save & Organize – Keep a history of spills for reporting and compliance Export & Share – Generate clean reports via text or email Built-In Help – Quick guidance when you need it in the field Whether you’re handling a small containment or a large-scale incident, Spill Calc Pro simplifies the math and delivers answers fast—so you can stay focused on the job.

About

Zerosec Note

Features
Read full description

The 'Zerosec Note' app is a powerful tool designed to improve and enhance brain efficiency. It introduces an "extreme" method of note-taking to help users tackle challenges like slow thinking, difficulty gathering information, indecision, and procrastination. By "extreme," we mean you must complete one note in 1 minute and dedicate 10 minutes daily to write 10 notes. After several weeks of consistent practice, you'll notice significant improvements in your thinking abilities. The app draws inspiration from the bestseller "Zero Second Thinking" by Yuji Akaba, a former McKinsey consultant. In his book, Akaba shares how he used A4 paper to organize fragmented thoughts, focusing on 1-minute "mental exercises" to enhance thinking and boost productivity. The 1.0 release offers core features such as note-taking, countdown timers, viewing, and editing notes. Stay tuned for future updates with exciting new features!

Screenshots

Spill Calc4 screens
Zerosec Note4 screens

Verdict

The call

The clearest difference is price: Zerosec Note at Free against Spill Calc's $2.99. Zerosec Note also leads on update cadence (weekly vs every 31 months). On ads, 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

CostPrice · In-app purchases · Ads · Monetization

Zerosec Note is free to download; Spill Calc costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Spill Calc ships an update every 31 months, Zerosec Note weekly. The most recent releases landed on October 1, 2026 and September 21, 2026 respectively.

Scorecard2 real differences · 8 level
Spill Calc versus Zerosec Note: the parameters behind the verdict, then further details
ParameterSpill CalcZerosec Note
Price$2.99Free — better
Rating4.0 (3 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 31 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.616.4 — better
Further details — not scored
Size1 MB1 MB
Age rating4+4+
DeveloperKelly Gayneaux崇旭 王

In-app purchases

None

Spill Calc

No in-app purchases

None

Zerosec Note

No in-app purchases

Questions

Is Spill Calc free?
Spill Calc costs $2.99, with no in-app purchases.
Is Zerosec Note free?
Zerosec Note is free to download, with no in-app purchases.
Do Spill Calc or Zerosec Note have ads?
Neither Spill Calc nor Zerosec Note shows ads.
Which is updated more often, Spill Calc or Zerosec Note?
Spill Calc ships an update every 31 months, and Zerosec Note weekly. Most recently, Spill Calc was updated on October 1, 2026 and Zerosec Note on September 21, 2026.

Other comparisons