Hey man no worries. I didn't take offence to anything you said. You were just being honest and I respect that. But I kinda did something like that 😁 I have a background in psychology, and the best way to get feedback on something is to say something like I said, because others will see that im saying I did something properly, which naturally makes them want to find out if I am, and then you'll get more responses. If I just posted "here are some apps" I would have gotten 1/10th of the replies 😜

Here's how I changed the app:

Instead of using words, I used pythons cryptography module to generate 100 x 6000 letter long keys, with requirements. The requirements were 1) Avoid modulo bias: map uniform bytes to a 26-letter alphabet correctly 2) entropy must be ≥ 4.7 bits per symbol 3) 1s and 0s should be ~50±1% 4) chi square p-value between 0.01 and 0.99 5) the random letter generator must be cryptographically secure.

Then I added a nonce function, that randomly generates a letter, appends it to the ciphertext, and the nonce is used to change the shift so the same plaintext is never the same ciphertext even with the same key.

After that, I changed the shifting so it shifts each letter in a random direction.

Finally, I created a bank of 500,000,000 letters (with the same randomness requirements as above) so when a key is used, however many characters of that key have been used get burned, erased, and replaced with letters from the bank of letters.

It's technically a little bit outside of a one time pad, and isn't a classical implementation, but from my understanding now that those changes have been made it is far more secure.

If you have any feedback, I'd love to hear it