# ISEC7 MAIL vs KleanBerlin

The clearest difference is in-app purchases: KleanBerlin at none against ISEC7 MAIL's 1. KleanBerlin also leads on iOS requirement (12.2 vs 16.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ISEC7 MAIL sells 1 in-app purchase, starting at $32.99 per year. KleanBerlin asks for nothing beyond the download.

ISEC7 MAIL ships an update every 3 weeks, KleanBerlin fortnightly. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | ISEC7 MAIL | KleanBerlin |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | Freemium | — |
| Size | 74 MB | 101 MB |
| Requires iOS | 16.0 | **12.2** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ISEC7 Group](https://appshunter.io/developer/466418066) | [Softwareentwicklung Schittkowski  GmbH](https://appshunter.io/developer/1068208943) |

## What reviewers say

### ISEC7 MAIL

[App page](https://appshunter.io/ios/app/isec7-mail/id1045017598)

Securely access and manage Microsoft Exchange and Office 365 email, contacts, and calendars from your mobile device. Offers features like mailbox delegation, public folder integration, and S/MIME encryption for sensitive information.

**Highlights:** Secure access to Exchange/Office 365, Contact, calendar, task, and note management, Mailbox delegation, Public folder integration, Certificate-based authentication, S/MIME encrypted and signed emails

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription | $32.99 | per year |


### KleanBerlin

[App page](https://appshunter.io/ios/app/kleanberlin/id6751594572)

**In-app purchases:** none


## Frequently asked questions

### Is ISEC7 MAIL free?

ISEC7 MAIL is free to download, with in-app purchases available.

### Is KleanBerlin free?

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

### Do ISEC7 MAIL or KleanBerlin have ads?

Neither ISEC7 MAIL nor KleanBerlin shows ads.

### Which is updated more often, ISEC7 MAIL or KleanBerlin?

ISEC7 MAIL ships an update every 3 weeks, and KleanBerlin fortnightly. Most recently, ISEC7 MAIL was updated on November 2, 2026 and KleanBerlin on November 5, 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.*