# Spill Calc vs Zerosec Note

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.

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.

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.

## The numbers

| Metric | Spill Calc | Zerosec Note |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/spill-calc-pro/id1554282536/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 31 months | **Weekly** |
| Monetization | Paid | — |
| Size | 1 MB | 1 MB |
| Requires iOS | 16.6 | **16.4** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) | [崇旭 王](https://appshunter.io/developer/1782724458) |

## What reviewers say

### Spill Calc

[App page](https://appshunter.io/ios/app/spill-calc-pro/id1554282536)

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:** macOS Compatibility

**In-app purchases:** none


### Zerosec Note

[App page](https://appshunter.io/ios/app/zerosec-note/id6738882186)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked 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.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*