Comparison

App Secret Pro vs Shift Unit

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

Head to head
About

App Secret Pro

Securely store photos, videos, notes, contacts, and voice memos with multiple lock options. Protect your private data from unauthorized access with customizable security layers and features like decoy mode.

Highlights
  • Multiple lock styles (passcode, combination, dot-pattern)
  • Private photo and video albums
  • Secure notes with lockable folders
  • Protected reminders
  • Voice memo recording and playback
  • Private contact management
  • Break-in reports and decoy mode
Features
Read full description

App Secret is your personal vault for securing sensitive photos, videos, notes, contacts, and more — all protected by multiple layers of customizable security. Whether you’re guarding personal memories or confidential information, App Secret ensures only you have access. Ever lent someone your phone only to catch them swiping through your gallery, notes, or reminders? With App Secret, that stops now. Easily lock your private content with a passcode, combination, or dot-pattern, and keep prying eyes out of your business. -- KEY FEATURES -- Multiple Lock Styles • Numeric passcode lock • Combination lock • Dot-pattern lock for enhanced security Private Photos & Videos • Create and lock individual albums • Import from your photo library or take photos in-app • Export back to your device easily • Move, copy, and paste between albums Secure Notes • Organize notes into lockable folders • Move, copy, paste, and search your notes • Simple folder management for better organization Protected Reminders • Create reminders in secure folders • Copy, move, and paste with ease • Keep tasks and plans private Voice Memos • Record, rename, delete, and playback • Share voice memos securely • Optional speaker output Private Contacts • Fully-featured contact management • Add, edit, delete, and search contacts • Batch import/export with vCard support • Add custom fields beyond standard info Extra Security Tools • Break-in reports • Decoy mode with a fake password • Universal app — works on both iPhone & iPad with a single purchase • Intuitive, easy-to-use interface Your privacy matters. Take control of your data with App Secret — the smart, simple, and secure solution for keeping your private life truly private. Visit us for more great apps: https://app2pro.com • Terms of Service: https://airdisk.app/terms-of-service/ • Privacy Policy: https://airdisk.app/privacy-policy/ • Standard Apple Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Shift Unit

This utility app offers precise unit and currency conversions with over 1400 units across 34 categories. It supports light/dark modes, home widgets, and an independent Apple Watch app. Features include a custom keypad with calculator mode and educational Wikipedia integration.

Highlights
  • 1400+ conversion units
  • 34 categories
  • Light/dark mode support
  • Home widget
  • Apple Watch app
  • Custom keypad with calculator
  • Wikipedia integration
Features
Read full description

Shift Unit is a unit converter designed with usability and numerical precision in mind. It features 1400+ conversion units across 34 categories. It works great in light or dark mode, and as a Home Widget w/ localized number displays. Independent WatchOS app and complications. Operations can be carried out in portrait mode in simple precision (7 significant digits,) or in landscape mode in double precision (14 significant digits.) Conversion formulae use exact definitions of related entities--not approximations. Wikipedia page information can be pulled for categories and conversion units. (Look for info circle.) The custom keypad has a calculator mode, and allows to enter/edit numbers on either side of the conversion. Unit categories include Acceleration, Angle, Area, Bit Rate, Clock, Online Currencies, Data Storage, Area Density, Volumetric Density, Electric Charge, Electric Current, Energy, Volumetric Flow Rate, Force, Frequency, Fuel, Length, Luminance, Lux, Mass Flow Rate, Momentum, Power, Pressure, Radiation Dose, Radioactivity, Radiation Exposure, Speed, Temperature, Temperature Delta, Time, Torque, Typography, Volume, and Weight. Features: - One screen operation minimizing number of gestures - Numbers (digits, decimal/grouping separators, exponent)/time/country names localized to your (or any) region - Current time in 2 out of 439 world cities and see your cities pinned on a flyover map, an educational way of discovering the world through time zones - Weather conditions and forecast for time zone cities - Dedicated accessibility labels and hints for VoiceOver operations - Customizable number entry timeout allowing to enter a new number without having to clear the field. (Turned off when an accessibility feature, e.g. VoiceOver, is on) - Customizable user interface (preferred categories; user interface alignment for left/right-handed entry or 2-thumb operations) - Ability to swap units while keeping initial numerical entry - Category presets for quick change of context, including user preset - Long-press category button to remove, or add a category on the fly - Long-press number field for copy/paste - Paste Mathematical constants (Pi, e, etc.) - Education via Wikipedia pages for categories and conversion units - Currency conversions using online rates - Searchable list of currency rates with possibility to change base rate - Set favorite currencies - Built-in numeric keypad (with calculator mode) to enter numbers on either side of the conversion - Long-press delete key to clear the field in focus - Engineering number format handling - Infinity and negative numbers handling - 7 or 14-digit precision displays (3-digit fractions for currencies) - Searchable list of 1400+ conversion units across 34 categories - On-boarding screens for general operations and for the Currency category (turned off when VoiceOver is on) - Home widget for quick conversions using units selected in the hosting app Happy Conversions!

Screenshots

App Secret Pro4 screens
Shift Unit4 screens

Verdict

The call

The clearest difference is review sentiment: Shift Unit at 100% against App Secret Pro's 42%. Shift Unit also leads on price (Free vs $3.99) and rating (5.0 vs 4.4). App Secret Pro's advantage is ratings volume (122 vs 21). On update cadence, ads, device support and iOS requirement 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

Shift Unit is free to download; App Secret Pro costs $3.99 up front. App Secret Pro sells 3 in-app purchases, starting at $1.99 per month. Shift Unit asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Shift Unit holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: App Secret Pro has 122 ratings behind it against 21, so its average is the more settled of the two. Written reviews point the same way: 42% of App Secret Pro's written reviews are positive against 100% of Shift Unit's.

UpkeepUpdate frequency

App Secret Pro ships an update monthly, Shift Unit every 2 months. The most recent releases landed on September 30, 2026 and September 6, 2026 respectively.

Scorecard6 real differences · 4 level
App Secret Pro versus Shift Unit: the parameters behind the verdict, then further details
ParameterApp Secret ProShift Unit
Price$3.99Free — better
Rating4.4 (122 ratings)5.0 (21 ratings) — better
Positive reviews41.6% of reviews100.0% of reviews — better
Number of ratings122 — better21
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS15.0 — better16.0
Further details — not scored
Size87 MB20 MB
Age rating4+4+
DeveloperFelix YewDidier Burton

Customer experience

App Secret Pro

All ratings122 ratings
Positive84.4%
Neutral4.1%
Negative11.5%
Written reviews161 reviews
Positive41.6%
Neutral11.2%
Negative47.2%

Shift Unit

All ratings21 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews9 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

App Secret Pro

Reported bugs

52 issues
  • Importing video does nothing
  • Deleted all photos
  • App cannot be opened
  • App won't even open
  • Privacy policy concerns (data collection)
Show 47 more
  • Where are my photos and videos?
  • Password log uses rear camera and is useless
  • Green dot appears when using app (camera usage?)
  • Bug in fake passcode: sub-folder lock redirects to main files
  • App is very buggy, randomly closes often
  • Paid for it and it doesn't work
  • Cannot upload
  • Cannot play video
  • App crashes before anything can be done
  • Last update was 2 years ago
  • Error while uploading photos
  • Photos not added, program became garbage
  • App crashes after entering password
  • Cannot import photo that was already taken after update
  • Passcode will not set on new device
  • Cannot see all photos in a folder (over a certain amount)
  • App crashes when pressing info icon on a pic
  • Last version cannot open the app
  • App crashes before opening
  • App crashes immediately after entering password
  • Lost all data after update
  • App crashes before opening
  • Photos are mixed up
  • App crashes every time trying to open
  • App crashes immediately
  • App doesn't open anymore
  • Crashes at passcode entry
  • Won't open after update
  • App crashes since iOS 8 update
  • App crashes after update, lost all data
  • Many bugs in this version
  • Media not stable, clicking image goes to first one
  • App quits immediately after update
  • Cannot open the program
  • App crashes every time to unlock
  • Cannot access photo in the middle of the album
  • Clicking on any picture automatically goes to the first one
  • Forgot my pass, how to get it back?
  • Contacts issues, application crashes while importing
  • Notes disappear or not saved
  • Password can be skipped by closing and reopening from multitask tab
  • Photos and notes do not sync
  • Fake log does not work properly
  • Passcode lock does not work, random passcode accepted
  • Fake password opens master access files
  • App crashes when trying to delete reminders
  • Problem accessing photos even if permission is on

Requested features

10 requests
  • Import notes and contacts directly from iPhone
  • Ability to reorder files
  • Login with fingerprints
  • Continuous shooting on built-in camera
  • Touch ID support
Show 5 more
  • Wi-Fi sharing between PC and app
  • Log in report with location
  • Arabic language support
  • Disable unlock sound
  • Photo folders displayed by upload date

Shift Unit

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

App Secret Pro

Subscriptions2
  • iCloud Sync Monthly$1.991 Month
  • iCloud Sync Yearly$12.991 Year
One-time1
  • Reset Password$1.99
None

Shift Unit

No in-app purchases

Questions

Is App Secret Pro free?
App Secret Pro costs $3.99, and also offers in-app purchases.
Is Shift Unit free?
Shift Unit is free to download, with no in-app purchases.
Which has better reviews, App Secret Pro or Shift Unit?
Shift Unit is rated higher. App Secret Pro averages 4.4 out of 5 from 122 ratings, while Shift Unit averages 5.0 from 21 ratings.
Do App Secret Pro or Shift Unit have ads?
Neither App Secret Pro nor Shift Unit shows ads.
Which is updated more often, App Secret Pro or Shift Unit?
App Secret Pro ships an update monthly, and Shift Unit every 2 months. Most recently, App Secret Pro was updated on September 30, 2026 and Shift Unit on September 6, 2026.

Other comparisons