Comparison

Sub Cipher vs Secret Keyboard

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

Head to head
About

Sub Cipher

Easily encode and decode messages using simple substitution ciphers like Caesar and Atbash. Convert up to 2,000 characters at a time and save your cipher settings for later use. Ideal for fun educational purposes, not for serious secret messaging.

Highlights
  • Encode/decode simple substitution ciphers
  • Supports Caesar and Atbash cipher methods
  • Converts up to 2,000 characters at once
  • Save cipher settings as text
  • Create magic decoder wheels
  • No licensing or royalties required for published ciphers
Features
Read full description

Sub Cipher is an easy-to-use Encoder/Decoder app, which can encode or decode your text using various "simple substitution" cipher methods. * Simply type or copy-paste your encoded or decoded text to and from e-mail, messages, social media, and it is immediately converted for you. Up to 2,000 characters can be converted at a time. Sub Cipher offers you the encoded text, placeholder-text, and even a magic decoder wheel that you can add to your own books and publications. You can also capture the cipher settings you have dialed in (as lines of text) to save in another document. This can be useful if you are publishing a newsletter or book of ciphers, and want to keep a record of the settings you used with each cipher along with the cipher itself. Main Features: *Easy to use: Type into the plain-text or the cypher-text box, and the converted text is immediately displayed. *Easy to transfer: You can select all the converted text and paste it into any other text document. *Easy to adjust: Any substitution offset, forward or reverse can be dialed in. *Easy to save: The settings you dial in can also be saved as text for your notes. *Easy to publish: Any ciphers you make are 100% yours to publish and sell; no copyright restrictions or restrictive "commercial use" clauses here. *Forever Free: Download this software once and it is yours forever. You get all future new features and updates free. No upgrade costs or "subscription/rental" fees. Ever. *No Ads: You are never distracted from enjoying my software. *Human-Made: This software was completely and carefully hand-designed and written by me. No A.I. toys were allowed anywhere near this software. *Private: Your work is safely yours and always stays on your computer. You are never required to create internet accounts, and none of your information is ever stored in the cloud. * Caveat Emptor: It uses the "Caesar" and "Atbash" style cipher methods, which are simple offset-alphabet ciphers. The well-known "Rot13" cipher is one of these. These ancient styles of ciphers are very simple and easy to decode! This is simply a fun educational utility, and is not intended for serious "secret message" work.

About

Secret Keyboard

This app provides a secure way to send and receive sensitive information through a specialized keyboard. It automatically encrypts your typed messages and allows you to decode received secret messages and sounds by copying them to the keyboard. Customize your typing experience with various themes.

Highlights
  • Send and receive secret messages
  • Decode secret messages and sounds
  • Automatic text encryption
  • Customizable keyboard themes
  • Pro version with auto-decode and ad-free experience
Features
Read full description

The secret keyboard allows you to send and receive secret messages and sounds. It's a safer way of sending and receiving sensitive information. To send a secret message, simply type anything and the text will automatically become secret text as you type. To decode a secret message or a secret sound, simply copy the secret message and tap the unlock button on the secret keyboard to reveal the decoded secret message and play the secret sound. You can also customize your secret keyboard by selecting from the many keyboard themes available. Secret Keyboard Pro - Auto-decode secret text - Auto-play secret sounds - All keyboard themes - No ads The Secret Keyboard app offers three auto-renewing subscriptions and one lifetime purchase. Try Secret Pro for free! Try Secret Keyboard Pro for 3 days, 1 week, or 1 month! • Payment will be charged to iTunes Account at confirmation of purchase. • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Privacy Policy https://secretkeyboard.com/privacy Terms & Conditions https://secretkeyboard.com/terms

Screenshots

Sub Cipher4 screens
Secret Keyboard3 screens

Verdict

The call

The clearest difference is rating: Secret Keyboard at 4.3 against Sub Cipher's 3.8. Secret Keyboard also leads on update cadence (every 3 days vs every 7 months) and iOS requirement (14.0 vs 16.6). Sub Cipher's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price, ratings volume 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. Secret Keyboard sells 4 in-app purchases, starting at $0.99 per 7 days. Sub Cipher asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Secret Keyboard holds the better App Store score, 4.3 against 3.8. Both are backed by a comparable volume of ratings — 4 and 6 respectively. Written reviews complicate that: 100% of Sub Cipher's written reviews are positive against 67% of Secret Keyboard's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Sub Cipher ships an update every 7 months, Secret Keyboard every 3 days. The most recent releases landed on October 1, 2026 and October 14, 2026 respectively.

Scorecard7 real differences · 3 level
Sub Cipher versus Secret Keyboard: the parameters behind the verdict, then further details
ParameterSub CipherSecret Keyboard
PriceFreeFree
Rating3.8 (4 ratings)4.3 (6 ratings) — better
Positive reviews100.0% of reviews — better66.7% of reviews
Number of ratings46 — better
Update frequencyEvery 7 monthsEvery 3 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, Mac — betteriPhone, iPod
Requires iOS16.614.0 — better
Further details — not scored
Size40 MB6 MB
Age rating4+4+
DeveloperEduard SchwanHex Array Inc.

Customer experience

Sub Cipher

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Secret Keyboard

All ratings6 ratings
Positive83.3%
Neutral0.0%
Negative16.7%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Sub Cipher

No in-app purchases

4 purchases

Secret Keyboard

Subscriptions3
  • Secret Keyboard Pro - Weekly3 Days trial$0.997 Days
  • Secret Keyboard Pro - Monthly3 Days trial$1.991 Month
  • Secret Keyboard Pro - Yearly3 Days trial$14.991 Year
One-time1
  • Secret Keyboard Pro - Lifetime$49.99

Questions

Is Sub Cipher free?
Sub Cipher is free to download, with no in-app purchases.
Is Secret Keyboard free?
Secret Keyboard is free to download, with in-app purchases available.
Which has better reviews, Sub Cipher or Secret Keyboard?
Secret Keyboard is rated higher. Sub Cipher averages 3.8 out of 5 from 4 ratings, while Secret Keyboard averages 4.3 from 6 ratings.
Do Sub Cipher or Secret Keyboard have ads?
Secret Keyboard shows ads; Sub Cipher does not.
Which is updated more often, Sub Cipher or Secret Keyboard?
Sub Cipher ships an update every 7 months, and Secret Keyboard every 3 days. Most recently, Sub Cipher was updated on October 1, 2026 and Secret Keyboard on October 14, 2026.

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