# Spill Calc Lite vs AmpVault

The clearest difference is price: Spill Calc Lite at Free against AmpVault's $4.99. Spill Calc Lite also leads on device support. AmpVault's advantage is update cadence (every 11 days vs every 16 months) and ratings volume (8 vs 1). On rating, in-app purchases and iOS requirement there is nothing between them.

Spill Calc Lite is free to download; AmpVault costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Spill Calc Lite against 5.0 for AmpVault. That said, the two scores are not equally well evidenced: AmpVault has 8 ratings behind it against 1, so its average is the more settled of the two.

Spill Calc Lite ships an update every 16 months, AmpVault every 11 days. Both last shipped on November 2, 2026.

## The numbers

| Metric | Spill Calc Lite | AmpVault |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/spill-calc-lite/id1089421597/reviews) | [5.0 (8 ratings)](https://appshunter.io/ios/app/ampvault/id6751367558/reviews) |
| Number of ratings | 1 | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 16 months | **Every 11 days** |
| Monetization | **Free** | Paid |
| Size | 1 MB | 27 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [Kelly Gayneaux](https://appshunter.io/developer/1082576429) | [Chris Snider](https://appshunter.io/developer/1830863973) |

## 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


### AmpVault

[App page](https://appshunter.io/ios/app/ampvault/id6751367558)

This app provides electricians and contractors with quick, accurate, and code-aligned information in the field. It consolidates essential tools like NEC handbooks, OSHA binders, and calculators into a single, offline-first platform for safety and efficiency.

**Highlights:** Offline-first platform, NEC handbook access, OSHA binder information, Integrated calculators, Safety tools, Productivity features

**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 AmpVault free?

AmpVault costs $4.99, with no in-app purchases.

### Which has better reviews, Spill Calc Lite or AmpVault?

Spill Calc Lite and AmpVault are both rated 5.0 out of 5 on the App Store, from 1 and 8 ratings respectively.

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

Spill Calc Lite ships an update every 16 months, and AmpVault every 11 days. Most recently, Spill Calc Lite was updated on November 2, 2026 and AmpVault on November 2, 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.*