# Rainfall Calculator vs Tank Volume Calculators

The clearest difference is rating: Rainfall Calculator at 5.0 against Tank Volume Calculators's 1.8. Rainfall Calculator also leads on price ($2.99 vs $3.99). Tank Volume Calculators's advantage is update cadence (every 4 months vs every 29 months) and ratings volume (5 vs 1). On ads, in-app purchases, monetization model and device support there is nothing between them.

Rainfall Calculator costs $2.99 and Tank Volume Calculators $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rainfall Calculator holds the better App Store score, 5.0 against 1.8. That said, the two scores are not equally well evidenced: Tank Volume Calculators has 5 ratings behind it against 1, so its average is the more settled of the two.

Rainfall Calculator ships an update every 29 months, Tank Volume Calculators every 4 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Rainfall Calculator | Tank Volume Calculators |
| --- | --- | --- |
| Price | **$2.99** | $3.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rainfall-calculator/id1446150880/reviews)** | [1.8 (5 ratings)](https://appshunter.io/ios/app/tank-volume-calculators/id6477382115/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 29 months | **Every 4 months** |
| Monetization | Paid | Paid |
| Size | 1 MB | 28 MB |
| Requires iOS | 13 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Kantaben Gorasiya](https://appshunter.io/developer/1640260396) |

## What reviewers say

### Rainfall Calculator

[App page](https://appshunter.io/ios/app/rainfall-calculator/id1446150880)

Calculate potential rainwater harvest volume and cost savings. This tool helps determine annual water collection capacity based on rainfall and roof area, recommending optimal tank sizes for efficient water storage. It also allows for cost-saving analysis by comparing harvested water to mains water prices.

**Highlights:** Instant rainwater calculation, Cost savings evaluation, Minimum tank size recommendation, Supports various input units, Formula references included, Results copyable to other apps

**Features:** macOS Compatibility

**In-app purchases:** none


### Tank Volume Calculators

[App page](https://appshunter.io/ios/app/tank-volume-calculators/id6477382115)

Easily calculate the filled and half-filled volumes of various tank types. This app offers a comprehensive volume converter for numerous units and supports 15 different tank shapes for accurate estimations.

**Highlights:** Calculate filled and half-filled tank volumes, Supports 15 different tank types, Comprehensive volume converter, Converts between multiple units, Intuitive user interface, Rapid capacity calculations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Rainfall Calculator free?

Rainfall Calculator costs $2.99, with no in-app purchases.

### Is Tank Volume Calculators free?

Tank Volume Calculators costs $3.99, with no in-app purchases.

### Which has better reviews, Rainfall Calculator or Tank Volume Calculators?

Rainfall Calculator is rated higher. Rainfall Calculator averages 5.0 out of 5 from 1 ratings, while Tank Volume Calculators averages 1.8 from 5 ratings.

### Do Rainfall Calculator or Tank Volume Calculators have ads?

Neither Rainfall Calculator nor Tank Volume Calculators shows ads.

### Which is updated more often, Rainfall Calculator or Tank Volume Calculators?

Rainfall Calculator ships an update every 29 months, and Tank Volume Calculators every 4 months. Most recently, Rainfall Calculator was updated on November 2, 2026 and Tank Volume Calculators on November 4, 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.*