Comparison

Krypt vs ChartEye

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

Head to head
About

Krypt

Features
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Krypt is a fully offline, AES-256 encrypted vault for iPhone. Every password, note, file, and 2FA code you store is encrypted and kept exclusively on your device โ€” never sent to a server, never synced to a cloud, never shared with anyone. ENCRYPTED FILE VAULT Import photos, documents, and scans directly into the vault. Each file is individually encrypted. Scan physical documents with your camera and store them as encrypted PDFs โ€” passports, contracts, bank statements, anything sensitive. PASSWORDS Store unlimited logins, PINs, and credentials. Generate strong passwords with the built-in cryptographic generator. Copy passwords to clipboard with one tap โ€” automatically cleared after 30 seconds so nothing lingers. BUILT-IN 2FA AUTHENTICATOR Replace Google Authenticator. Store your TOTP codes inside the same encrypted vault as your passwords. No separate app, no separate risk. FACE ID & TOUCH ID Unlock instantly with biometrics. Or configure Face ID to open the decoy vault โ€” your real data stays hidden even under biometric pressure. THE DECOY VAULT Set a second PIN that opens a completely different vault. If anyone ever pressures you to unlock your phone, show them the decoy. They will never know the real vault exists. BUILT TO PROTECT ITSELF Wrong PIN attempts trigger increasing lockout periods. After 10 failed attempts the vault permanently wipes itself โ€” leaving no trace of your data. WHAT KRYPT NEVER DOES โ€” Never connects to the internet โ€” Never syncs to iCloud โ€” Never tracks you โ€” Never shows ads โ€” Never sells your data SECURITY ARCHITECTURE AES-256-GCM encryption. PBKDF2-SHA256 key derivation with 310,000 iterations. Keys stored in iOS Keychain with device-only binding โ€” never extractable, never backed up to iCloud. Screenshot detection. Clipboard auto-clear. App switcher cover. Krypt is free to start, with encrypted backup import and export included. Krypt Pro unlocks unlimited storage, the file vault, built-in 2FA authenticator, and the decoy vault. By downloading this app, you agree to the Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

ChartEye

Features
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Need a Snellen eye chart for a quick at-home vision check or a classroom? ChartEye makes a true-size Snellen-style eye chart for your viewing distance, on screen and as a printable PDF. Set the viewing distance from 5 to 20 feet. Each letter's height follows the Snellen standard โ€” a 20/20 letter subtends 5 arc minutes at that distance โ€” so the rows are the right size when you stand back at the chosen distance. โ€ข EIGHT SNELLEN ROWS โ€” from 20/200 down to 20/20, each labeled with its acuity value, at every distance from 5 to 20 ft. โ€ข TRUE-SIZE PRINTABLE PDF โ€” letters sized by their actual printed height; when the rows need more room, the chart continues on a second Letter page instead of leaving any row out. A 100 mm scale bar lets you confirm the printer didn't shrink the page. โ€ข TRUE-SIZE ON SCREEN โ€” after a quick card calibration, the phone shows one row at a time at its real size; step between larger and smaller rows. โ€ข TUMBLING E โ€” a chart for children or anyone who doesn't read Latin letters, with each E facing a random direction; shuffle for a fresh set. โ€ข CARD CALIBRATION โ€” hold a bank or debit card upright against the screen and match the outline, so the on-screen letters are true size on your device. ChartEye is a screening aid only. It is not a medical device, does not diagnose anything and is not a substitute for a professional eye exam. If you notice any change in your vision, see an optometrist or ophthalmologist. Everything is made on your device; no account needed. The on-screen chart is free, and your first 3 PDF charts are free. A one-time $4.99 unlock gives you unlimited PDFs. No subscription, no ads. Questions: overlapmarr@gmail.com

Screenshots

Krypt4 screens
ChartEye3 screens

Verdict

The call

Krypt and ChartEye are too close to call on the numbers: across 6 compared parameters โ€” price, update cadence, ads and in-app purchases among them โ€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Krypt sells 3 in-app purchases, starting at $3.99 per month and ChartEye sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Krypt ships an update weekly, ChartEye every 2 weeks. The most recent releases landed on October 15, 2026 and October 6, 2026 respectively.

ScorecardNo meaningful differences
Krypt versus ChartEye: the parameters behind the verdict, then further details
ParameterKryptChartEye
PriceFreeFree
Update frequencyWeekly โ€” betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS17.616.0 โ€” better
Further details โ€” not scored
Size3 MB1 MB
Age rating4++4
DeveloperEpicSoftwareJhomar Maravillas

In-app purchases

3 purchases

Krypt

Subscriptions2
  • Krypt Pro Monthly7 Days trial$3.991 Month
  • Krypt Pro Annual7 Days trial$23.901 Year
One-time1
  • Krypt Pro Lifetime$29.99
1 purchases

ChartEye

One-time1
  • Unlock Unlimited$4.99

Questions

Is Krypt free?
Krypt is free to download, with in-app purchases available.
Is ChartEye free?
ChartEye is free to download, with in-app purchases available.
Do Krypt or ChartEye have ads?
Neither Krypt nor ChartEye shows ads.
Which is updated more often, Krypt or ChartEye?
Krypt ships an update weekly, and ChartEye every 2 weeks. Most recently, Krypt was updated on October 15, 2026 and ChartEye on October 6, 2026.

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