# Spill Calc Lite vs Integrity Assured

Spill Calc Lite and Integrity Assured are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Spill Calc Lite ships an update every 16 months, Integrity Assured every 20 months. The most recent releases landed on October 20, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Spill Calc Lite | Integrity Assured |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/spill-calc-lite/id1089421597/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 16 months** | Every 20 months |
| Monetization | Free | — |
| Size | 1 MB | 173 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) | [Enerpac](https://appshunter.io/developer/1614468160) |

## What reviewers say

### Spill Calc Lite

[App page](https://appshunter.io/ios/app/spill-calc-lite/id1089421597)

Quickly estimate surface spill volumes in the field with this tool. Calculate for square, rectangular, circular, and triangular spills, with options for tank displacement. Features a clean interface and helpful library for efficient on-site calculations.

**Highlights:** Estimate surface spill volumes, Calculate for square, rectangular, circular, and triangular spills, Optional tank displacement calculation, Immediate results in barrels and gallons, Clean and modern interface, Easy-to-use Help Library

**Features:** macOS Compatibility

**In-app purchases:** none


### Integrity Assured

[App page](https://appshunter.io/ios/app/integrity-assured/id1669655495)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Spill Calc Lite free?

Spill Calc Lite is free to download, with no in-app purchases.

### Is Integrity Assured free?

Integrity Assured is free to download, with no in-app purchases.

### Do Spill Calc Lite or Integrity Assured have ads?

Neither Spill Calc Lite nor Integrity Assured shows ads.

### Which is updated more often, Spill Calc Lite or Integrity Assured?

Spill Calc Lite ships an update every 16 months, and Integrity Assured every 20 months. Most recently, Spill Calc Lite was updated on October 20, 2026 and Integrity Assured on October 17, 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.*