# Rainfall Calculator vs Paint Calculator Plus

Rainfall Calculator and Paint Calculator Plus are too close to call on the numbers: across 8 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.

Rainfall Calculator costs $2.99 and Paint Calculator Plus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Rainfall Calculator ships an update every 29 months, Paint Calculator Plus every 38 months. The most recent releases landed on September 9, 2026 and July 5, 2026 respectively.

## The numbers

| Metric | Rainfall Calculator | Paint Calculator Plus |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rainfall-calculator/id1446150880/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 29 months** | Every 38 months |
| Monetization | Paid | Paid |
| Best chart rank | **#176** | #200 |
| Size | 1 MB | 9 MB |
| Requires iOS | 13 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [Heng Jia Liang](https://appshunter.io/developer/1532000635) |

## What reviewers say

### Rainfall Calculator

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

**Currently charting:** #176 Top Paid · Productivity (US App Store)

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


### Paint Calculator Plus

[App page](https://appshunter.io/ios/app/paint-calculator-plus/id1639463551)

**Currently charting:** #200 Top Paid · Productivity (US App Store)

Estimate the exact amount of paint and primer needed for any project. Input wall dimensions and exclude areas like doors and windows for precise calculations. Supports metric and imperial units.

**Highlights:** Instant paint calculations, Input multiple walls and surfaces, Exclude doors, windows, and openings, Automatic area calculations, Supports metric and imperial units, Copy results to other apps

**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 Paint Calculator Plus free?

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

### Do Rainfall Calculator or Paint Calculator Plus have ads?

Neither Rainfall Calculator nor Paint Calculator Plus shows ads.

### Which is updated more often, Rainfall Calculator or Paint Calculator Plus?

Rainfall Calculator ships an update every 29 months, and Paint Calculator Plus every 38 months. Most recently, Rainfall Calculator was updated on September 9, 2026 and Paint Calculator Plus on July 5, 2026.

### Which is more popular, Rainfall Calculator or Paint Calculator Plus?

Rainfall Calculator currently peaks at #176 in the App Store charts, and Paint Calculator Plus at #200. Chart position reflects recent download velocity rather than total install base.

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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.*