# AI App Builder Appy Pie vs Rainfall Calculator

The clearest difference is price: AI App Builder Appy Pie at Free against Rainfall Calculator's $2.99. AI App Builder Appy Pie also leads on update cadence (every 2 months vs every 29 months) and ratings volume (633 vs 1). Rainfall Calculator's advantage is rating (5.0 vs 4.3) and in-app purchases (none vs 5). On ads and device support there is nothing between them.

AI App Builder Appy Pie is free to download; Rainfall Calculator costs $2.99 up front. AI App Builder Appy Pie sells 5 in-app purchases, starting at $15.99 per month. Rainfall Calculator asks for nothing beyond the download.

Rainfall Calculator holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: AI App Builder Appy Pie has 633 ratings behind it against 1, so its average is the more settled of the two.

AI App Builder Appy Pie ships an update every 2 months, Rainfall Calculator every 29 months. The most recent releases landed on October 29, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | AI App Builder Appy Pie | Rainfall Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | [4.3 (633 ratings)](https://appshunter.io/ios/app/ai-app-builder-appy-pie/id1304743009/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rainfall-calculator/id1446150880/reviews)** |
| Number of ratings | **633** | 1 |
| Positive reviews | 54.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 29 months |
| Monetization | **Free** | Paid |
| Size | 16 MB | 1 MB |
| Requires iOS | 17.0 | **13** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Appy Pie LLP](https://appshunter.io/developer/1291004059) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### AI App Builder Appy Pie

[App page](https://appshunter.io/ios/app/ai-app-builder-appy-pie/id1304743009)

Create a professional website quickly and easily using AI. Transform your text into a responsive, user-friendly site in seconds without coding. Customize with drag-and-drop tools and leverage AI for automation and data analysis.

**Highlights:** Turn text into website in seconds, AI-powered website development, No coding required, Drag-and-drop interface, Responsive design, Customizable templates and themes, AI analytics for user data

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Grow Monthly Plan | $15.99 | per month |
| Start Monthly Plan | $17.99 | per month |
| Mobile Monthly Plan | $60.00 | per month |
| Grow Plan | $159.99 | per year |
| Start Annual Plan | $179.99 | per year |

**What reviewers like**

- 👍 Best work
- 👍 Great app build
- 👍 Affordable and simple
- 👍 Intuitive website builder
- 👍 Easy to use website builder

**What reviewers complain about**

- 🐛 Doesn't work
- 🐛 Faulty debit
- 🐛 Bait and switch
- 🐛 Cancelled trial and still charged but doesn't work
- 🐛 Trash

**Reported bugs**

- App crashes when I click on users
- Login screen freezes
- Incompatible with older devices

**Requested features**

- Dark mode option
- Advanced analytics dashboard


### 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


## Frequently asked questions

### Is AI App Builder Appy Pie free?

AI App Builder Appy Pie is free to download, with in-app purchases available.

### Is Rainfall Calculator free?

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

### Which has better reviews, AI App Builder Appy Pie or Rainfall Calculator?

Rainfall Calculator is rated higher. AI App Builder Appy Pie averages 4.3 out of 5 from 633 ratings, while Rainfall Calculator averages 5.0 from 1 ratings.

### Do AI App Builder Appy Pie or Rainfall Calculator have ads?

Neither AI App Builder Appy Pie nor Rainfall Calculator shows ads.

### Which is updated more often, AI App Builder Appy Pie or Rainfall Calculator?

AI App Builder Appy Pie ships an update every 2 months, and Rainfall Calculator every 29 months. Most recently, AI App Builder Appy Pie was updated on October 29, 2026 and Rainfall Calculator on October 13, 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.*