GMX vs Viewer by SEPPmail
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GMX
Manage your email, cloud storage, and news in one convenient app. Features a smart inbox that automatically categorizes emails for better organization and a secure cloud for file backup and sharing. Enjoy customizable push notifications and PIN protection for enhanced security.
- Smart Inbox for automatic email categorization
- Secure cloud storage for file backup and sharing
- Customizable push notifications
- PIN protection for secure access
- Support for multiple GMX mail accounts
- Battery-saving email push service
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Email, cloud & news - all in the account! The free GMX Mail App is your faithful companion on the road! The Smart Inbox takes a lot of work off your hands! Incoming emails arrive automatically in the inbox of your mailbox. One after the other, in chronological order - but mixed thematically. In the smart inbox, new e-mails are displayed in individual categories - automatically, for a better overview. In the inbox, everything remains the same. With the cloud, GMX offers you a professional, free storage solution. It is equally suitable for file backup as well as for simple and fast sharing of large files - e.g. photo series. Thanks to the highest security standards, the Cloud is virtually undestroyable and with Cloud made in Germany, it also meets the highest standards in terms of data protection. Particularly useful: The GMX Mail app also supports your other GMX Mail accounts. So you always keep an eye on all your GMX mailboxes, in one app! Our "Push Sounds" are especially popular: these individually adjustable notifications sound as soon as a new email is received. Handling is also very simple and intuitive, and the interface, which is adapted to the smartphone, is particularly user-friendly. The battery-saving e-mail push service and the secure, protected access with PIN protection are further plus points. For these very reasons, the GMX Mail app has already been downloaded and installed more than a million times! Terms of Use: https://www.gmx.co.uk/company/terms/ Privacy Policy: https://www.gmx.co.uk/company/privacypolicy/
Viewer by SEPPmail
This application allows you to receive, decrypt, and read secure emails with "secure-email.html" attachments. It is designed for users who have received encrypted messages sent via a SEPPmail Appliance.
- Receive encrypted emails
- Decrypt secure attachments
- Read secure email content
- Supports SEPPmail Appliance encryption
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Sie haben eine verschlüsselte E-Mail mit einem "secure-email.html" Anhang in Ihrer Mailbox ? Diese wurde durch jemanden mit einer SEPPmail Appliance verschlüsselt und an Sie versendet. Mit der SEPPmail Viewer-APP können Sie diese empfangen, entschlüsseln und lesen.
Screenshots
Verdict
The clearest difference is review sentiment: GMX at 71% against Viewer by SEPPmail's 0%. GMX also leads on rating (4.7 vs 1.0) and update cadence (every 2 weeks vs every 13 months). Viewer by SEPPmail's advantage is in-app purchases (none vs 19) and ads (none vs shown). On price and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. GMX sells 12 in-app purchases, starting at $0.99 per month. Viewer by SEPPmail asks for nothing beyond the download.
GMX holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: GMX has 17K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 71% of GMX's written reviews are positive against 0% of Viewer by SEPPmail's.
GMX ships an update every 2 weeks, Viewer by SEPPmail every 13 months. The most recent releases landed on September 24, 2026 and August 24, 2026 respectively.
| Parameter | GMX | Viewer by SEPPmail |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (17K ratings) — better | 1.0 (1 ratings) |
| Positive reviews | 70.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 17K — better | 1 |
| Update frequency | Every 2 weeks — better | Every 13 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 370 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | 1&1 Mail & Media GmbH | SEPPmail AG |
Customer experience
GMX
Viewer by SEPPmail
Bugs and requests
GMX
Reported bugs
3 issues- Frequent sign-outs
- Inconsistent sync between devices
- Inability to access certain folders
Requested features
5 requests- Customizable font sizes
- Dark mode option
- Improved spam filtering
- Better integration with other apps
- Ability to schedule emails
Viewer by SEPPmail
Not enough reviews yet to summarise bugs or requests.
In-app purchases
GMX
- Cloud 30 GB3 variants$0.991 Month
- TrackFree$1.491 Month
- adfree App$1.991 Month
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- Cloud 100 GB$1.991 Month
- Cloud 150 GB3 variants$2.491 Month
- Cloud 250 GB2 variants$3.491 Month
- GMX ProMail2 variants$3.991 Month
- GMX ProMail2 variants$4.491 Month
- GMX TopMail$6.991 Month
- AdFree$22.901 Year
- GMX ProMail$49.991 Year
- GMX TopMail$69.991 Year
Viewer by SEPPmail
No in-app purchases
