# iBal Rotary vs Proton Mail

The clearest difference is price: Proton Mail at Free against iBal Rotary's $17.99. Proton Mail also leads on rating (4.8 vs 4.4) and ratings volume (47K vs 23). iBal Rotary's advantage is review sentiment (83% vs 46%) and in-app purchases (none vs 6). On ads and device support there is nothing between them.

Proton Mail is free to download; iBal Rotary costs $17.99 up front. Proton Mail sells 6 in-app purchases, starting at $5.99 per month. iBal Rotary asks for nothing beyond the download.

Proton Mail holds the better App Store score, 4.8 against 4.4. That said, the two scores are not equally well evidenced: Proton Mail has 47K ratings behind it against 23, so its average is the more settled of the two. Written reviews complicate that: 83% of iBal Rotary's written reviews are positive against 46% of Proton Mail's, so the app with the better star average is not the one people write more warmly about.

iBal Rotary ships an update every 2 months, Proton Mail every 11 days. The most recent releases landed on September 25, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | iBal Rotary | Proton Mail |
| --- | --- | --- |
| Price | $17.99 | **Free** |
| Rating | [4.4 (23 ratings)](https://appshunter.io/ios/app/ibal-rotary/id567642367/reviews) | **[4.8 (47K ratings)](https://appshunter.io/ios/app/proton-mail-encrypted-email/id979659905/reviews)** |
| Number of ratings | 23 | **47K** |
| Positive reviews | **82.9% of reviews** | 46.2% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 11 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | #197 | **#62** |
| Size | 29 MB | 272 MB |
| Requires iOS | 26.0 | **17.2** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [AirSpayce](https://appshunter.io/developer/564666685) | [Proton AG](https://appshunter.io/developer/979659484) |

## What reviewers say

### iBal Rotary

[App page](https://appshunter.io/ios/app/ibal-rotary/id567642367)

**Currently charting:** #197 Top Paid · Productivity (US App Store)

This app helps helicopter pilots quickly calculate weight and balance for their aircraft. It supports numerous helicopter models and allows users to add custom aircraft configurations. The app provides graphical displays and can email mission manifests, aiding in compliance with aviation regulations.

**Highlights:** Supports numerous helicopter types, Add custom aircraft configurations, Graphical CG displays, Email mission manifests, Detects weight and CG problems, Predefined load lists

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Fast and accurate calculations
- 👍 User-friendly and simple interface
- 🛠️ Excellent customer support
- ✅ Reliable and functional
- 💡 Versatile and complete

**What reviewers complain about**

- 💰 Repurchase required for new versions
- 🔊 Annoying sounds
- 👎 Poor user interface
- 📉 Outdated data
- 🤷‍♂️ Stations cannot be deleted

**Reported bugs**

- App crashes on iPhone 4 since latest update
- Choose photo function does not work on iPad Mini Retina
- Math is sometimes wrong
- Rounding of aircraft values is annoying

**Requested features**

- Add B3E aircraft
- Ability to modify aircraft data
- Add BK-117 D2/D3 (H145) to aircraft list
- Add Bell 505 to aircraft library
- Input fuel burn to calculate flight duration estimate


### Proton Mail

[App page](https://appshunter.io/ios/app/proton-mail-encrypted-email/id979659905)

**Currently charting:** #62 Top Free · Productivity, #83 Top Grossing · Productivity (US App Store)

This encrypted email service from Switzerland prioritizes user privacy with end-to-end encryption. It offers robust security features to protect your communications from phishing, spam, and tracking, allowing you to manage your inbox with ease.

**Highlights:** End-to-end encryption, Password-protected emails, Multiple account support, Inbox organization (folders, labels), Dark mode, Phishing and spam protection

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mail Plus 1 month | $5.99 | per month |
| Unlimited 1 month | $14.99 | per month |
| Mail Plus 12 months | $47.90 | per year |
| Unlimited 1 year | $119.00 | per year |
| Mail Plus (1 year) | $59.99 | one-time |
| Proton Unlimited | $149.99 | one-time |

**What reviewers like**

- 🚀 Smooth performance
- 🔒 Excellent security and privacy
- 👍 Clean and intuitive interface
- 💡 Expanding ecosystem of Proton services

**What reviewers complain about**

- 🐛 Occasional crashes and bugs
- ⏱️ Slow email loading times
- 📝 Lacking advanced email management features
- 💰 Expensive paid plans

**Reported bugs**

- Login issues and lost email data
- Unreliable push notifications
- Inconsistent user experience between app and web

**Requested features**

- Conversation threading and email previews
- Customizable notification sounds
- Offline email access
- Improved syncing across devices


## Frequently asked questions

### Is iBal Rotary free?

iBal Rotary costs $17.99, with no in-app purchases.

### Is Proton Mail free?

Proton Mail is free to download, with in-app purchases available.

### Which has better reviews, iBal Rotary or Proton Mail?

Proton Mail is rated higher. iBal Rotary averages 4.4 out of 5 from 23 ratings, while Proton Mail averages 4.8 from 47K ratings.

### Do iBal Rotary or Proton Mail have ads?

Neither iBal Rotary nor Proton Mail shows ads.

### Which is updated more often, iBal Rotary or Proton Mail?

iBal Rotary ships an update every 2 months, and Proton Mail every 11 days. Most recently, iBal Rotary was updated on September 25, 2026 and Proton Mail on September 26, 2026.

### Which is more popular, iBal Rotary or Proton Mail?

iBal Rotary currently peaks at #197 in the App Store charts, and Proton Mail at #62. 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.*