CipherKit vs Part 107 in 7 Days
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
CipherKit
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Crack any cipher, encrypt anything, and train your brain with daily puzzles. CipherKit is a complete cryptography lab, codebreaking toolkit, puzzle game, and encrypted vault that works fully offline. SOLVE UNKNOWN CIPHERTEXT Paste, type, or scan a message and let CipherKit figure it out: ⒠Auto-detects the likely cipher and recovers the key ⒠Solvers for Vigenère, Beaufort, Gronsfeld, monoalphabetic substitution, affine, rail fence, and columnar transposition ⒠Interactive Substitution Workbench: tap letters to map them, lock what you know, auto-fill by frequency, or let the hill-climbing solver finish ⒠Frequency analysis and index of coincidence in five languages ⒠Recognizes Base64, hex, binary, URL, and decimal encodings ⒠Honest results when text looks like modern encryption ⒠Save sessions with notes and come back later ENCRYPT WITH 48 CIPHERS From antiquity to the present day: ⒠Substitution: Caesar, ROT13, Atbash, Affine, Keyword, Baconian, Homophonic ⒠Polyalphabetic: Vigenère, Beaufort, Autokey, Running Key, Gronsfeld ⒠Transposition: Rail Fence, Columnar, Scytale, Route ⒠Polygraphic: Playfair, Two-Square, Four-Square, Bifid, Trifid, Hill, ADFGX, ADFGVX, Nihilist, Polybius ⒠Machines: Enigma, M-209, Jefferson Disk ⒠Stream: RC4, ChaCha20, Salsa20, One-Time Pad, Vernam, LFSR ⒠Block and AEAD: AES, DES, Blowfish, Twofish, Camellia, AES-GCM, ChaCha20-Poly1305 ⒠Public key: RSA and Diffie-Hellman demonstrations ⒠Morse code and Tap Code, with audio playback WATCH CIPHERS WORK Animated visualizers show every step: rotating Caesar rings, the Vigenère tabula recta, rail fence zig-zags, Playfair grids, columnar read-offs, Enigma rotors stepping, and Morse timelines. Chain several ciphers into a recipe and save it. PLAY EVERY DAY ⒠Daily challenge with streaks, history, and shareable results ⒠125 hand-verified puzzles across 10 packs, from Easy to Diablo ⒠Sprint, No-Hint Challenge, and endless Cipher Drill modes ⒠Share puzzles with friends by link or QR code ⒠Achievements, mastery levels, and Game Center leaderboards LEARN CRYPTOGRAPHY Interactive lessons with quizzes for every cipher family, a timeline from the scytale to post-quantum encryption, and history, weaknesses, and worked examples for each cipher. KEEP SECRETS SAFE The Vault stores notes with AES-256-GCM encryption, protected by Face ID, Touch ID, or your passcode. Organize with folders and tags, auto-lock on a timer, and export encrypted backups. WORKS EVERYWHERE ⒠Home Screen and Lock Screen widgets with today's challenge and your streak ⒠Control Center control to jump into the daily challenge ⒠Share extension: decode text from Safari, Messages, or any app ⒠Apple Watch app with a Morse tapper that sends to your iPhone ⒠Live camera capture for printed ciphertext ⒠Siri and Shortcuts: encode, decode, analyze, or check your streak ⒠Native Mac app with keyboard shortcuts PRIVATE BY DESIGN No account. No tracking. No servers. Everything stays on your device unless you turn on optional iCloud sync. CIPHERKIT PRO CipherKit is free to download, and the core toolkit stays free. CipherKit Pro is a one-time $9.99 purchase, no subscription, and unlocks expert and Diablo packs, the Machine Room pack, modern crypto ciphers, visualizers, chain recipes, and vault backup. Visualizers and chain recipes include three free tries each. Paid for CipherKit before it went free? Pro is already yours. Great for cryptography students, puzzle lovers, escape room fans, teachers, security enthusiasts, and anyone who likes making their brain earn its keep. Download CipherKit and start cracking.
Part 107 in 7 Days
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Failing the Part 107 knowledge test costs about $175 and a 14-day wait before you can sit it again. This app teaches the material instead of drilling you on a question bank: a 7-day course of 46 lessons, built on six real FAA sectional charts. Miss a question and a "Teach me why" mini-lesson opens on the exact idea you got wrong, usually with a line to remember it by. Most of the 528 questions in the bank carry one; every one of them explains its answer. WHAT'S INSIDE - Seven guided days: airspace and sectional charts, weather, operations, regulations in two parts, a weak-area drill, exam day. 36 core lessons, about six and a half hours, plus 10 optional deep dives, seven of them on real charts. - 528 exam-bank questions written from primary sources β 14 CFR Part 107, the AIM, AC 107-2A β plus generated practice that regenerates instead of repeating. - 48 map packs cut from six real FAA sectionals (Albuquerque, Los Angeles, Washington, Las Vegas, Miami, Wichita), each with about 30 questions and free pinch-zoom exploration. - Tap-the-chart drills: you tap the tower, the Class C ring, the MEF, the restricted area β on the chart itself. - Chart Room: a full sectional in a pinch-zoom viewer with a 16-drill find-it-on-the-map deck. - Can I Fly Here? β a go/no-go simulator over 147 real charted launch sites. Make the call, then tap every section of Part 107 that drove it. Scored on what you missed and on what you wrongly blamed. - Spot the Violation: 10 illustrated operations. Find what breaks a rule without flagging what is legal. - METAR and TAF trainer: reports generated fresh every time, with tappable token decoding and a "can you legally fly?" call at the end. - Loading and performance problems β payload, density altitude, load factor, battery endurance β generated with computed answers. - Review queue: your own misses come back on a widening ladder β 1, 1, 3, 7, 16, 35 days β and five right in a row retires an item. - Flight tools: a wind-component rose you drag, a density-altitude scratchpad, a 30-card chart-symbol trainer, and a ramp-check walkthrough for the day an inspector asks. - 60-second sprint: one minute of facts you shouldn't have to reason out, against your own best. - Mock exam in the live format: 65 questions (60 scored plus 5 unscored), three choices each, two hours, 70% to pass, with per-topic results and every miss reviewable. - Certification journey: 11 plain-English stages from "do I qualify" to recurrent training, most linked to the official FAA page. REAL CHARTS, NOT JUST THE SUPPLEMENT Beginning October 27, 2026, the unmanned aircraft knowledge test starts embedding sectional-chart images that are not in the testing supplement (FAA Airman Testing Community Advisory, June 2026). Reading a chart cold becomes the skill, not recognizing a memorized figure. Every chart excerpt in this app is cut from a real sectional, and its caption names the chart and the edition. BUILT TO THE WEIGHTING THE TEST USES NOW Regulations 48%, Operations 25%, Airspace 20%, Weather 5%, Loading and Performance 2% β the PSI UAG Information Bulletin effective September 29, 2025. Most study material still follows the older ACS table, which weighted regulations far lower. Here the mock exam, the weak-area drill and the readiness score all run on the live numbers, and every teaching module states its weight with the source. The readiness score counts concepts you have never touched against you, so it starts low on purpose. THE TERMS One price, paid once. No subscription, no in-app purchases, no ads, no account, no email address. Your progress lives on your phone and is never uploaded. The whole app works in airplane mode; only the official FAA links in the certification walkthrough need a connection. There is one optional nightly study reminder; decline it and we never ask again. Independent FAA Part 107 exam preparation. Not affiliated with or endorsed by the Federal Aviation Administration.
Screenshots
Verdict
The clearest difference is price: CipherKit at Free against Part 107 in 7 Days's $19.99. CipherKit also leads on device support (3 vs 1). Part 107 in 7 Days's advantage is iOS requirement (16.4 vs 18.0). On ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
CipherKit is free to download; Part 107 in 7 Days costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | CipherKit | Part 107 in 7 Days |
|---|---|---|
| Price | Free β better | $19.99 |
| Update frequency | Every 6 months | β |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Apple Watch β better | iPhone |
| Requires iOS | 18.0 | 16.4 β better |
| Further details β not scored | ||
| Size | 23 MB | 81 MB |
| Age rating | +4 | 12+ |
| Developer | Zossoz | Christopher Arnold |
In-app purchases
CipherKit
No in-app purchases
Part 107 in 7 Days
No in-app purchases
Questions
Is CipherKit free?
Is Part 107 in 7 Days free?
Do CipherKit or Part 107 in 7 Days have ads?
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