# Tank Partial Volume Calculator vs nextvoice

The clearest difference is price: nextvoice at Free against Tank Partial Volume Calculator's $2.99. nextvoice also leads on update cadence (every 3 months vs every 56 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

nextvoice is free to download; Tank Partial Volume Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Tank Partial Volume Calculator ships an update every 56 months, nextvoice every 3 months. The most recent releases landed on August 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | Tank Partial Volume Calculator | nextvoice |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 56 months | **Every 3 months** |
| Monetization | Paid | — |
| Size | 1 MB | 109 MB |
| Requires iOS | 16.1 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Imran Pinjara](https://appshunter.io/developer/1484488781) | [Vadacom Limited](https://appshunter.io/developer/368468771) |

## What reviewers say

### Tank Partial Volume Calculator

[App page](https://appshunter.io/ios/app/tank-partial-volume-calculator/id1491608421)

Calculate the partial and full volume of horizontal and vertical tanks with various head types. This tool is designed for engineers to determine liquid volumes at any height, simplifying capacity calculations for storage tanks and pressure vessels.

**Highlights:** Horizontal and vertical tank volume calculation, Supports flat, torispherical, hemispherical, and ellipsoidal heads, Calculates full volume, Determines liquid volume at any height, Outputs in cubic meters, liters, and gallons, Input in millimeters or metric system

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

**In-app purchases:** none


### nextvoice

[App page](https://appshunter.io/ios/app/nextvoice/id1551990357)

**In-app purchases:** none


## Frequently asked questions

### Is Tank Partial Volume Calculator free?

Tank Partial Volume Calculator costs $2.99, with no in-app purchases.

### Is nextvoice free?

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

### Do Tank Partial Volume Calculator or nextvoice have ads?

Neither Tank Partial Volume Calculator nor nextvoice shows ads.

### Which is updated more often, Tank Partial Volume Calculator or nextvoice?

Tank Partial Volume Calculator ships an update every 56 months, and nextvoice every 3 months. Most recently, Tank Partial Volume Calculator was updated on August 24, 2026 and nextvoice on September 9, 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.*