Comparison

Paranoia Text Encryption PRO vs CarKeep

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

Head to head
About

Paranoia Text Encryption PRO

Securely encrypt and decrypt sensitive text data using a wide range of advanced algorithms. Protect notes, messages, and cryptocurrency keys. Features steganography to hide data within images and post-quantum key exchange.

Highlights
  • Multiple strong encryption algorithms
  • Steganography for image data hiding
  • Post-quantum key encapsulation (KEM)
  • Unlimited password management
  • Cross-platform compatibility (iOS, macOS)
  • Copy/paste and file saving
Features
Read full description

• Paranoia Text Encryption PRO is a universal text encryption application for iOS (iPhone/iPad/iPod) and macOS by Paranoia Works. • Paranoia Text Encryption ensures the safety of your notes, SMS messages, emails, social networking posts, cryptocurrency keys (seeds, mnemonics), and any other text from all unwanted readers. • The app offers true security, encrypting data using the strongest encryption algorithms available: Threefish 1024-bit, SHACAL-2 512-bit, Paranoia C4 2048-bit (a cascade of Threefish, Serpent, AES, and SHACAL-2), Blowfish 448-bit, AES 256-bit, RC6 256-bit, Serpent 256-bit, and Twofish 256-bit ciphers. • Simply copy and paste text to and from your favorite applications, or save it to a file for future use. • This app does not function as a "Vault application." Instead, a password is set for the current encryption/decryption session, not for entering the app itself. You may have an unlimited number of passwords for any purpose—different files, tasks, people, etc. • Steganography: The application offers steganographic features, allowing you to conceal text or files within a JPEG image. Two algorithms are available: J-UNIWARD (content-adaptive, minimizes visual distortion, harder to detect) and F5 (matrix encoding, efficient embedding). The selected algorithm works with your chosen symmetric cipher to create the final steganogram. • Key Encapsulation (KEM): Securely exchange encryption passwords using the post-quantum ML-KEM mechanism (NIST FIPS 203). Two parties can establish a shared password without ever transmitting it directly, with protection against future quantum computer attacks. ◆ Differences between Free and PRO versions: The PRO version offers additional encryption algorithms, specifically Threefish 1024-bit, SHACAL-2 512-bit, and Paranoia C4 2048-bit (a cascade of Threefish–Serpent–AES–SHACAL-2). While the free version can decrypt data encrypted by these advanced algorithms, the ability to encrypt data using them is exclusive to the PRO version. The PRO version also provides a key to activate the PRO versions of our desktop applications: Paranoia File & Text Encryption for PC, Paranoia Text Encryption for PC, and S.S.E. File Encryptor for PC. • The application is directly compatible with macOS (10.15 and later). Versions for other systems and platforms are available on the application's homepage (download section - https://paranoiaworks.mobi/download/). • An online (web-based) version, utilizing AES and client-side JavaScript, and other utilities are available at https://pteo.paranoiaworks.mobi

About

CarKeep

This app helps you manage your vehicle's maintenance and expenses. Track fuel costs, log services, and receive reminders for upcoming tasks to keep your car in optimal condition.

Highlights
  • Vehicle maintenance tracking
  • Fuel expense management
  • Service reminders
  • User-friendly interface
Features
Read full description

CarKeep is the car maintenance log that tells you when your next service is due and what your car really costs. One purchase, yours forever. No subscription, no ads, no account. KNOW WHEN SERVICE IS DUE • Countdown in days and miles to your next service • Smart prediction based on how much you actually drive • Part-by-part plan: oil, filters, brake pads, tires, timing belt, coolant and more, each with its own interval • Notifications a week before and on the day, so nothing is ever overdue LOG EVERY SERVICE IN SECONDS • Record date, mileage, parts replaced and cost • Attach invoices and photos to each service • Scan the receipt with your camera and the amount fills in automatically • Full history: what was done, when, and how much it cost TRACK WHAT YOUR CAR COSTS • Fuel log with gallons, price per gallon and odometer • Fuel economy (MPG or L/100 km) and cost per mile • Other expenses: insurance, inspection, parking, tolls, car wash • Monthly and yearly totals, fuel vs. everything else YOUR WHOLE GARAGE • Unlimited vehicles, switch between them with one tap • 70+ brand logos and your own accent color • Keep documents with the car: registration, insurance policy, inspection certificate • Automatic reminders for inspection and insurance renewal TAKE IT WITH YOU • Export the service history as a PDF, perfect when you sell the car • Full JSON backup of all your data • Siri Shortcuts: "Add refuel in CarKeep", "When is my next service in CarKeep?" • Miles or kilometers, your currency • Available in English, Spanish, Portuguese, French and German PRIVATE BY DESIGN Your data stays on your iPhone. No account, no tracking, no cloud you didn't ask for. ONE PRICE. EVERYTHING INCLUDED. No subscription, no "pro" tier, no ads. Buy once and own it. Questions or ideas? Write to us from the app. We read everything.

Screenshots

Paranoia Text Encryption PRO4 screens
CarKeep4 screens

Verdict

The call

The clearest difference is review sentiment: Paranoia Text Encryption PRO at 84% against CarKeep's 0%. Paranoia Text Encryption PRO also leads on rating (4.7 vs 2.0) and update cadence (every 2 months vs every 16 months). CarKeep's advantage is price ($0.49 vs $3.99). On ads, in-app purchases and monetization model 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

Paranoia Text Encryption PRO costs $3.99 and CarKeep $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Paranoia Text Encryption PRO holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: Paranoia Text Encryption PRO has 53 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 84% of Paranoia Text Encryption PRO's written reviews are positive against 0% of CarKeep's.

UpkeepUpdate frequency

Paranoia Text Encryption PRO ships an update every 2 months, CarKeep every 16 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

Scorecard7 real differences · 3 level
Paranoia Text Encryption PRO versus CarKeep: the parameters behind the verdict, then further details
ParameterParanoia Text Encryption PROCarKeep
Price$3.99$0.49 — better
Rating4.7 (53 ratings) — better2.0 (1 ratings)
Positive reviews83.6% of reviews — better0.0% of reviews
Number of ratings53 — better1
Update frequencyEvery 2 months — betterEvery 16 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod, Mac — betteriPhone
Requires iOS14.5 — better17.0
Further details — not scored
Size18 MB22 MB
Age rating4+4+
DeveloperFrantisek DvorakCristian Caride Rodriguez

Customer experience

Paranoia Text Encryption PRO

All ratings52 ratings
Positive92.3%
Neutral1.9%
Negative5.8%
Written reviews55 reviews
Positive83.6%
Neutral7.3%
Negative9.1%

CarKeep

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Paranoia Text Encryption PRO

Reported bugs

5 issues
  • Free version not working
  • Paid version buggy
  • Data transfer via cellular network (resolved)
  • Incompatible with other steganography apps
  • Not iPhone 6s Plus optimized

Requested features

12 requests
  • PIN for app lock
  • Auto-erase log/history
  • Save session passwords in keychain
  • Integration with quick commands for automation
  • PGP support
Show 7 more
  • File encryption option
  • Dark mode setting
  • Text size settings
  • Search functionality in editor
  • Multiple user use
  • Separate and group storage
  • More encryption algorithm types

CarKeep

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Paranoia Text Encryption PRO

No in-app purchases

None

CarKeep

No in-app purchases

Questions

Is Paranoia Text Encryption PRO free?
Paranoia Text Encryption PRO costs $3.99, with no in-app purchases.
Is CarKeep free?
CarKeep costs $0.49, with no in-app purchases.
Which has better reviews, Paranoia Text Encryption PRO or CarKeep?
Paranoia Text Encryption PRO is rated higher. Paranoia Text Encryption PRO averages 4.7 out of 5 from 53 ratings, while CarKeep averages 2.0 from 1 ratings.
Do Paranoia Text Encryption PRO or CarKeep have ads?
Neither Paranoia Text Encryption PRO nor CarKeep shows ads.
Which is updated more often, Paranoia Text Encryption PRO or CarKeep?
Paranoia Text Encryption PRO ships an update every 2 months, and CarKeep every 16 months. Most recently, Paranoia Text Encryption PRO was updated on November 1, 2026 and CarKeep on November 4, 2026.

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