Comparison

Dual Flip Clock vs Blackwing Vault

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

Head to head
About

Dual Flip Clock

Transform an old phone into a stylish desktop clock with this app. Easily switch between time zones for different cities or schools, and enjoy automatic day and night modes for a comfortable viewing experience.

Highlights
  • Desktop clock conversion
  • Multiple city/school time zones
  • Vertical and horizontal layouts
  • Automatic Day/Night Modes
  • Customizable display
Features
Read full description

I'm in Beijing. My family is in Vancouver. I used to do the math on my fingers, or open the world clock twice. Now I turn the phone sideways onto the charging stand and both cities stand there side by side. I just look up. TWO CITIES, ONE SCREEN Two clocks, stacked or side by side, each on its own city's time. No more counting hours. FOUR LOOKS Flip, for the mechanical clack of a split-flap board. Glass, when you want it clean. City Day & Night, to see at a glance whether it's light over there. Single City, when you only care about one. WHAT'S THE WEATHER THERE Each clock carries the current conditions and temperature. Faster than asking "is it cold where you are?" IT DIMS WHEN IT GETS DARK THERE Night brightness follows the city on screen, not your phone. When it's night on their side, that half dims and the stars come out. Easy on the eyes at 3am. IT FINDS THE PLACE A built-in worldwide city database that also includes universities and high schools - search "Stanford University" and it's there. Anything missing is looked up online, and saved only if you pick it. Cities you use often float to the top. LOCK SCREEN AND HOME SCREEN WIDGETS Small, medium, large, extra large. The larger sizes show dates and weather for both cities at once. LANDSCAPE, ALWAYS ON The screen won't lock while the app is open - it's built to sit on a desk, a nightstand, a charging stand. Works in both landscape directions, so it's upright however you set it down. PRIVACY Location is optional. It's used only when you turn on GPS mode, to show the time and temperature where you are.

About

Blackwing Vault

A private, local-first vault for organizing and securing essential life details like IDs, insurance, and financial notes. It offers encrypted storage, optional iCloud sync, and biometric unlock for easy access and protection.

Highlights
  • Local-first encrypted vault storage
  • Optional iCloud sync
  • Biometric or device credential unlock
  • Templates for life details
  • Secure photo attachments
  • Expiration review for records
  • Emergency packet workflow
Features
Read full description

Blackwing Vault is a private, local first vault for the important life details that should not be scattered across notes, screenshots, email, or cloud spreadsheets. Store structured records for IDs, insurance, medical details, travel, home information, vehicle documents, family essentials, finance notes, recovery codes, device details, and custom secure notes. Blackwing Vault is built for the real life information people need to keep organized, protected, and ready when it matters. Why Blackwing Vault: - Local first encrypted vault storage - Device only encryption key stored in Keychain for local files - Optional Full Version encrypted iCloud sync across iPhone, iPad, and Mac - Optional biometric or device credential unlock - Passphrase protected encrypted backup export and restore - Templates for life details beyond passwords - Hidden fields with reveal controls - Secure photo attachments - Local search, favorites, and category filters - Expiration review for time sensitive records - Emergency packet workflow for household preparedness - Clipboard clearing after copied secrets - Privacy report built into the app - Infrastructure free sealed messages sent as locally encrypted attachments, with verifiable contact safety codes - No ads, no tracking, and no app account

Screenshots

Dual Flip Clock4 screens
Blackwing Vault4 screens

Verdict

The call

The clearest difference is rating: Dual Flip Clock at 5.0 against Blackwing Vault's 4.5. Dual Flip Clock also leads on in-app purchases (none vs 1) and update cadence (every 10 days vs every 2 months). On price, ratings volume, ads and device support 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

Both are free to download. Blackwing Vault sells 1 one-off in-app purchase. Dual Flip Clock asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Dual Flip Clock holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

UpkeepUpdate frequency

Dual Flip Clock ships an update every 10 days, Blackwing Vault every 2 months. The most recent releases landed on October 24, 2026 and October 31, 2026 respectively.

Scorecard4 real differences · 6 level
Dual Flip Clock versus Blackwing Vault: the parameters behind the verdict, then further details
ParameterDual Flip ClockBlackwing Vault
PriceFreeFree
Rating5.0 (2 ratings) — better4.5 (2 ratings)
Positive reviews100.0% of reviews—
Number of ratings22
Update frequencyEvery 10 days — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, MaciPhone, iPad, Mac
Requires iOS17.017.0
Further details — not scored
Size18 MB54 MB
Age rating4+4+
Developer路 林Raven Vector LLC

Customer experience

Dual Flip Clock

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Blackwing Vault

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Dual Flip Clock

No in-app purchases

1 purchases

Blackwing Vault

One-time1
  • English$9.99

Questions

Is Dual Flip Clock free?
Dual Flip Clock is free to download, with no in-app purchases.
Is Blackwing Vault free?
Blackwing Vault is free to download, with in-app purchases available.
Which has better reviews, Dual Flip Clock or Blackwing Vault?
Dual Flip Clock is rated higher. Dual Flip Clock averages 5.0 out of 5 from 2 ratings, while Blackwing Vault averages 4.5 from 2 ratings.
Do Dual Flip Clock or Blackwing Vault have ads?
Neither Dual Flip Clock nor Blackwing Vault shows ads.
Which is updated more often, Dual Flip Clock or Blackwing Vault?
Dual Flip Clock ships an update every 10 days, and Blackwing Vault every 2 months. Most recently, Dual Flip Clock was updated on October 24, 2026 and Blackwing Vault on October 31, 2026.

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