Showing 1–20 of 1,000 ranked alternatives.
Julian Tigler
Send secret messages with ciphers
Send encrypted messages using historical ciphers like A1Z26, Caesar Shift, and Vigenere. Encrypt text with customizable settings. Share coded messages via text or email. Decode messages using the same methods. View details and instructions.
Simon Booth
Encrypt messages and share
Encrypt and decrypt messages using multiple including Caesar Cipher, Machine, Affine Cipher, and Playfair Cipher. Add and manage custom . Share encrypted messages with others.
Nathaniel Van Evera
Encrypt messages with classic ciphers
Encrypt and decrypt messages directly in iMessage. Choose from ciphers like Caesar, Vigenère, and Rail Fence. Set a key to encode messages. Recipients can decrypt using the same extension.
Maxim Aleksa
Encrypt messages with Caesar and
Encrypt and decrypt messages using Caesar and . Input a message, choose a key or keyword, and generate an encrypted output. Decrypt messages by entering the correct key.
Ashraf Thoppukadavil
Track noise levels in real time
Measure levels in decibels using the device’s microphone. Display real-time audio frequency and dB readings. Apply filters for specific frequency and dB ranges. Share measurements via Messages, Email, WhatsApp, Notes, and other apps.
TINY BOOM LIMITED
Generate sound waves and customize audio frequencies
Create and visualize sound waves with frequency control from 0Hz to 22,000Hz. Measure decibels to assess noise levels. Emit ultrasonic frequencies to deter insects. Toggle between light and dark interface themes.
Shadow Launch Technology Limited
Capture traffic, record requests, configure rules
Capture and redirect HTTP/HTTPS/TCP traffic to a proxy server. Record and display HTTP, HTTPS, and DNS requests. Configure rules based on domain, IP range, or GeoIP. Track network usage and speed across different connections.
Hangzhou Suoyi Network Technology Co., Ltd.
Check with camera
Monitor using iPhone camera or Apple Watch. Track health status before and after workouts. Record and view data over time. Sync data with Apple Health. Set reminders for regular checks.
Wyllys Ingersoll
Send encrypted emails and files
Encrypt and decrypt files locally or in the cloud. Send and receive PGP encrypted messages via email. Create and manage public and private keys using RSA, DSA, ECDSA, EDDSA, or ECDH. Support OpenPGP standard for secure communication.
Pedro Daniel Macalupu Cumpen
Tune ukuleles with frequency display
Tune ukuleles with auto-tuning and frequency display. Supports multiple sizes including soprano, concert, tenor, and baritone. Includes LED pitch indicator, built-in , and metronome. Available for iPhone and iPad.
Brian Enigma
Solve puzzles, track clues, decode codes
Access codebreaking tools like decoder rings and countdown timers. View reference material on word frequency, morse code, and semaphore. Includes links to hunts, ARGs, and transmedia storytelling resources. Supports iOS 7.
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