Comparison

Dark Message Crypto Chat vs NextOne

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Dark Message Crypto Chat

Securely encrypt messages, photos, and documents offline using military-grade encryption. Share encrypted content through any app, and recipients can decrypt it with a shared passphrase. Protect your private conversations and confidential documents without needing an internet connection.

Highlights
  • Offline encryption for messages, photos, and documents
  • AES-256-GCM military-grade encryption
  • PBKDF2 brute-force protection
  • No internet permissions
  • Secure passphrase storage in iOS Keychain
  • Supports various document types
Features
Read full description

Dark Message — encrypt messages and files without the internet Write the way you always do: in any messenger, in mail, in social networks. Dark Message turns text, photos and documents into an encrypted message that only the holder of the same key can read. Anyone who intercepts it sees a string of characters. WHY DARK MESSAGE • Fully offline. The app has no internet access at all: no servers, no accounts, no sign-up, no analytics. Keys and messages never leave your phone. • Strong encryption: AES-256-GCM, with the key derived from your passphrase by PBKDF2-HMAC-SHA512 (600,000 iterations). • Works over any channel: copy the encrypted text and paste it anywhere. .darkm files travel as ordinary attachments. • Encrypts more than text: photos and documents (PDF, Word, Excel, any file), keeping the file name. A KEY IN SECONDS • Show a QR code and read out a six-digit PIN. The key inside the code is encrypted with that PIN, so a photo of the screen is useless to anyone else. • A key fingerprint next to every chat: the same on two phones means the same key. EASY TO USE • A separate key for every contact or group. • One-tap decryption: paste the text or open the file. • Dark and light themes, English and Russian. • Passphrases live in the system keychain. WHO IT IS FOR Private conversations, business documents, contracts, medical and financial records, family passwords — anything nobody but the recipient should read. Open source: you can check for yourself how it works. Updates keep all your chats and keys.

About

NextOne

Features
Read full description

nextOne — мобильное приложение для удалённого управления контроллерами доступа. С его помощью вы можете открывать шлагбаумы, ворота и другие устройства со смартфона, а также выдавать временный гостевой доступ по коду, номеру телефона, ссылке или номеру автомобиля (если доступно на конкретном объекте). Приложение показывает список доступных устройств, группирует их по объектам и позволяет быстро открыть нужный контроллер. При активной авторизации открыть проезд можно всего в 2 клика: выберите устройство из списка и нажмите кнопку открытия. Для гостей предусмотрены отдельные права: они могут только использовать выданный им временный доступ.

Screenshots

Dark Message Crypto Chat4 screens
NextOne4 screens

Verdict

The call

The clearest difference is update cadence: NextOne at every 2 months against Dark Message Crypto Chat's every 6 months. NextOne also leads on iOS requirement (13.0 vs 17.0). On price, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Dark Message Crypto Chat ships an update every 6 months, NextOne every 2 months. The most recent releases landed on October 3, 2026 and October 19, 2026 respectively.

Scorecard2 real differences · 8 level
Dark Message Crypto Chat versus NextOne: the parameters behind the verdict, then further details
ParameterDark Message Crypto ChatNextOne
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 6 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size2 MB22 MB
Age rating4+4+
Developeraleksandr bronnikovBogdan Frolov

In-app purchases

None

Dark Message Crypto Chat

No in-app purchases

None

NextOne

No in-app purchases

Questions

Is Dark Message Crypto Chat free?
Dark Message Crypto Chat is free to download, with no in-app purchases.
Is NextOne free?
NextOne is free to download, with no in-app purchases.
Do Dark Message Crypto Chat or NextOne have ads?
Neither Dark Message Crypto Chat nor NextOne shows ads.
Which is updated more often, Dark Message Crypto Chat or NextOne?
Dark Message Crypto Chat ships an update every 6 months, and NextOne every 2 months. Most recently, Dark Message Crypto Chat was updated on October 3, 2026 and NextOne on October 19, 2026.

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