# Proton Mail vs ObSync

The clearest difference is in-app purchases: ObSync at none against Proton Mail's 6. Proton Mail's advantage is chart position (#67 vs unranked). On price, update cadence, 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. ObSync asks for nothing beyond the download.

Proton Mail ships an update every 11 days, ObSync every 6 days. The most recent releases landed on September 25, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Proton Mail | ObSync |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (47K ratings)](https://appshunter.io/ios/app/proton-mail-encrypted-email/id979659905/reviews)** | — |
| Number of ratings | **47K** | — |
| Positive reviews | 46.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 days | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Best chart rank | **#67** | — |
| Size | 272 MB | 3 MB |
| Requires iOS | 17.2 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Proton AG](https://appshunter.io/developer/979659484) | [Karlo Milicic](https://appshunter.io/developer/1894954775) |

## What reviewers say

### Proton Mail

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

**Currently charting:** #67 Top Free · Productivity, #85 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


### ObSync

[App page](https://appshunter.io/ios/app/obsync/id6762672240)

**In-app purchases:** none


## Frequently asked questions

### Is Proton Mail free?

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

### Is ObSync free?

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

### Do Proton Mail or ObSync have ads?

Neither Proton Mail nor ObSync shows ads.

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

Proton Mail ships an update every 11 days, and ObSync every 6 days. Most recently, Proton Mail was updated on September 25, 2026 and ObSync on September 20, 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.*