# Proton Mail vs CYCLENBATT

The clearest difference is review sentiment: Proton Mail at 47% against CYCLENBATT's 0%. Proton Mail also leads on rating (4.8 vs 2.5) and update cadence (every 10 days vs every 4 months). CYCLENBATT's advantage is in-app purchases (none vs 6) and iOS requirement (13.0 vs 17.2). On price, ads and device support there is nothing between them.

Both are free to download. Proton Mail sells 6 in-app purchases, starting at $5.99 per month. CYCLENBATT asks for nothing beyond the download.

Proton Mail holds the better App Store score, 4.8 against 2.5. That said, the two scores are not equally well evidenced: Proton Mail has 48K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 47% of Proton Mail's written reviews are positive against 0% of CYCLENBATT's.

Proton Mail ships an update every 10 days, CYCLENBATT every 4 months. The most recent releases landed on October 18, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Proton Mail | CYCLENBATT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (48K ratings)](https://appshunter.io/ios/app/proton-mail-encrypted-email/id979659905/reviews)** | [2.5 (4 ratings)](https://appshunter.io/ios/app/cyclenbatt/id6740429396/reviews) |
| Number of ratings | **48K** | 4 |
| Positive reviews | **46.6% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Best chart rank | **#61** | — |
| Size | 272 MB | 35 MB |
| Requires iOS | 17.2 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Proton AG](https://appshunter.io/developer/979659484) | [Nanchang Yepai Technology Co., Ltd.](https://appshunter.io/developer/1503296093) |

## What reviewers say

### Proton Mail

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

**Currently charting:** #61 Top Free · Productivity, #87 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


### CYCLENBATT

[App page](https://appshunter.io/ios/app/cyclenbatt/id6740429396)

Monitor your lithium battery's voltage, current, and capacity in real-time via Bluetooth. Supports a wide range of battery types for agricultural, RV, industrial, and electric vehicle applications.

**Highlights:** Bluetooth connectivity, Real-time voltage display, Real-time current display, Real-time capacity display, Wide device compatibility

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

**In-app purchases:** none


## Frequently asked questions

### Is Proton Mail free?

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

### Is CYCLENBATT free?

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

### Which has better reviews, Proton Mail or CYCLENBATT?

Proton Mail is rated higher. Proton Mail averages 4.8 out of 5 from 48K ratings, while CYCLENBATT averages 2.5 from 4 ratings.

### Do Proton Mail or CYCLENBATT have ads?

Neither Proton Mail nor CYCLENBATT shows ads.

### Which is updated more often, Proton Mail or CYCLENBATT?

Proton Mail ships an update every 10 days, and CYCLENBATT every 4 months. Most recently, Proton Mail was updated on October 18, 2026 and CYCLENBATT on October 11, 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.*