QmailClient vs C2 Password
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
QmailClient
Access and manage all your email accounts from your mobile device. Browse, compose, reply, and organize emails stored on your QNAP NAS, even offline. Attach photos directly from your phone to emails.
- Manage multiple email accounts
- Browse emails from QNAP NAS
- Attach photos to emails
- Download attachments for offline reading
- Read, reply, forward, and delete emails
- Offline mail reading capability
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Manage all of your email accounts in the same place ! Connect your email accounts on your QNAP NAS with your iOS mobile devices to get started. Prerequisites: - iOS 16 or above - QNAP NAS running firmware version 4.3.3 or above Features: - Browse the email accounts on the Turbo NAS anytime, anywhere. - Support to attach photo from your mobile when compose mail. - Download your attachments to mobile devices for offline reading. - Easy management: Read, reply, replay, forward, move, flag, mark or delete mails on the Turbo NAS, all via your mobile device. No computer required. - Offline mail reading: QmailClient cache your mail from the Turbo NAS to mobile devices for offline reading.
C2 Password
Securely store, sync, and safeguard your passwords and personal information across unlimited devices. Access your credentials from anywhere via web, browser extension, or mobile app. All data is encrypted before leaving your device for maximum privacy.
- Secure password storage
- Unlimited device syncing
- Cross-platform access (web, extension, mobile)
- End-to-end encryption
- Autofill credentials
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C2 Password is a highly secure password management solution to store, sync, and safeguard your passwords and personal information. With unlimited device syncing, you will be able to access your credentials from anywhere through the web portal, browser extension, or mobile app. All the data you upload to C2 Password will be encrypted before leaving your devices, so no one except yourself can decrypt the data. Save time while keeping your data safe. Get started with C2 Password today! For our Terms of Service, visit: https://c2.synology.com/legal/terms_conditions
Screenshots
Verdict
The clearest difference is review sentiment: C2 Password at 61% against QmailClient's 0%. C2 Password also leads on rating (4.5 vs 2.0) and update cadence (monthly vs every 4 months). QmailClient's advantage is in-app purchases (none vs 3). On price, ads and iOS requirement 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. C2 Password sells 3 in-app purchases, starting at $4.49 per year. QmailClient asks for nothing beyond the download.
C2 Password holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: C2 Password has 178 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 0% of QmailClient's written reviews are positive against 61% of C2 Password's.
QmailClient ships an update every 4 months, C2 Password monthly. The most recent releases landed on October 1, 2026 and October 8, 2026 respectively.
| Parameter | QmailClient | C2 Password |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (6 ratings) | 4.5 (178 ratings) — better |
| Positive reviews | 0.0% of reviews | 60.8% of reviews — better |
| Number of ratings | 6 | 178 — better |
| Update frequency | Every 4 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 16.0 | 15.2 — better |
| Further details — not scored | ||
| Size | 40 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | QNAP Systems, Inc. | Synology Inc. |
Customer experience
QmailClient
C2 Password
In-app purchases
QmailClient
No in-app purchases
C2 Password
- Plus Plan (1 Year)1 Month trial$4.491 Year
- Plus Plan (1 Year)1 Month trial$4.991 Year
- Plus Plan (1 Year)1 Month trial$5.491 Year
