Reddcrypt vs black.com
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Reddcrypt
Encrypt your email communications effortlessly with this app. It offers end-to-end and zero-knowledge encryption, making it easy for anyone to send sensitive information securely on their smartphone or tablet. Enjoy enhanced privacy with a focus on user comfort and robust security.
- End-to-end encryption
- Zero knowledge encryption
- Easiest handling
- Use existing email address
- Automatic encryption
- 100% made in Germany
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Too complicated, too elaborate, uncomfortable to handle – The reasons for not using S/MIME or PGP are diverse. With REDDCRYPT these arguments are a thing of the past as everyone is capable of encrypting their email communication from now on. With the REDDCRYPT app for smartphones and tablets, even when you´re on the go. With REDDCRYPT we pursue the goal to make the world a little more secure. That is why we offer email encryption for everyone, both companies and single users. Our main focus is the best possible user comfort without cuts to security. At a glance: • You can continue to use your existing e-mail address • End-to-end encryption • Zero knowledge encryption • Easiest handling • 100% made in Germany • German servers This is how REDDCRYPT works: REDDCRYPT automatically encrypts your emails on your device before they are being send. Thus, your emails and their contents remain private. This way you can securely send sensitive information via email. You authenticate yourself on the REDDRYPT app with your email address and a password. A key pair comprising of public key and private key is automatically generated. Your private key is then encrypted with a password hash and uploaded to our servers together with your public key. Sounds too complicated? Don’t worry as most of this happens in the background. You only need to enter your email address and choose a password to generate the key pair. Writing an email happens locally on your device. Why is this important you may ask? Because only you can read the contents of the email as the process happens locally. Before sending the email it is automatically encrypted on your device. If the recipient is also a REDDCRYPT user, the encryption takes place with the public key of the recipient. This means that you don’t have to take action, as everything happens automatically in the background. If the recipient is not a user of REDDCRYPT yet, you will have to define a passphrase for this first mail with which the recipient can decrypt the mail. To make sure that only the intended recipient can read your email. you can disclose this passphrase to the recipient e.g. via sms or phone call. To be able to read the email the recipient authenticates on the REDDCRYPT app, as well. If he already has access and the email has been encrypted with this public key, then the recipient can open, read and answer your mail right away. If he didn’t have access yet, he will have to generate his own key pair to through his email address and a chosen password. Afterwards he can see your encrypted email which can be encrypted by entering the passphrase you have disclosed to the recipient earlier (e.g. via sms or phone call). This passphrase is only necessary for the decryption of the first email. With every email that comes afterwards the encryption and decryption process takes places automatically in the background. Highest user comfort and highest security – this is REDDCRYPT.
black.com
Secure and encrypted email with a personalized @black.com address. Features AI writing tools for effortless composition, unlimited storage, and alias addresses to manage spam. Protects your data with zero-access encryption and app-based two-factor authentication.
- Personalized @black.com email address
- Zero-access encryption
- AI-powered email composition
- Unlimited storage (25GB + annual increase)
- Spam-free alias addresses
- App-based two-factor authentication
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@black.com email address An email address is a reflection of your personal brand. Stand out with your own @black.com address that low-budget alternatives simply can't match. Secure & encrypted email Zero-Access Encryption secures your data with a key derived from your password. This means that not even we can access the contents of your stored emails. Our app-based two-factor authentication protects your account even if your password is compromised. Write emails effortlessly Supercharge your email experience with our integrated AI tools. Let the AI create, correct, optimize, and translate your messages. Unlock a whole new level of productivity and compose polished emails in a few seconds! Completely optional, of course. Unlimited* storage You start with 25 GB and get 2 GB of additional storage every year - forever. With normal usage, you will never run out of space. Alias addresses for a spam-free inbox Memorable and removable alias addresses like redcat42@black.com that you can use for newsletters etc. keep your inbox spam-free - forever. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
The clearest difference is rating: Reddcrypt at 5.0 against black.com's 3.6. Reddcrypt also leads on in-app purchases (none vs 1) and review sentiment (100% vs 67%). black.com's advantage is update cadence (every 6 weeks vs every 18 months) and ratings volume (9 vs 2). On price, ads 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. black.com sells 1 in-app purchase, starting at $4.99 per month. Reddcrypt asks for nothing beyond the download.
Reddcrypt holds the better App Store score, 5.0 against 3.6. Both are backed by a comparable volume of ratings — 2 and 9 respectively. Written reviews point the same way: 100% of Reddcrypt's written reviews are positive against 67% of black.com's.
Reddcrypt ships an update every 18 months, black.com every 6 weeks. The most recent releases landed on September 13, 2026 and September 17, 2026 respectively.
| Parameter | Reddcrypt | black.com |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 3.6 (9 ratings) |
| Positive reviews | 100.0% of reviews — better | 66.7% of reviews |
| Number of ratings | 2 | 9 — better |
| Update frequency | Every 18 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 169 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | REDDOXX GmbH | black.com GmbH |
Customer experience
Reddcrypt
black.com
In-app purchases
Reddcrypt
No in-app purchases
black.com
- Membership$4.991 Month









