Comparison

Date Formatter vs Stealth Contacts

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

Head to head
About

Date Formatter

This utility helps developers easily test and understand date and time format strings. It allows for setting custom dates, time zones, and supports over 689 locales for localized formatting.

Highlights
  • Test any date/time
  • Set different time zones
  • Support for 689+ locales
  • Quick guide with examples
  • Detailed reference for format symbols
Features
Read full description

Have you ever felt a headache when dealing with date/time format string? When things come to a localized date/time format, it's even more difficult. Date Formatter is a handy tool for the developer who is dealing with date/time format string. It makes your life with date format easier! With this tool, you can test any format string with any date/time and see the result simultaneously. Never tweak format strings in code and run the program again and again. Features: - Set any date/time - Set different time zones - Support more than 689 locales (you can test date strings in any country your iOS device support) - Quick guide with examples - Detailed reference with the symbol, number of symbols, examples and descriptions Now, speed up with your work with date time string and localization!

About

Stealth Contacts

Features
Read full description

Some contacts are just between you and you. StealthContacts is a secure, private contacts vault that keeps selected contacts completely separate from your system address book — invisible to other apps, never in your call history, never in your search results. Whether it's a therapist's number, a business contact you want off your main phone, or simply someone you'd rather keep private — StealthContacts gives you a clean, organized vault that only you can access. CALLER ID THAT WORKS* When a contact calls, their name shows on your screen — even though they're not in your system contacts. You'll always know who's calling, without exposing their details to your phone. FACE ID & PASSCODE PROTECTION Lock your vault with Face ID, Touch ID, or a numeric or alphanumeric passcode. Configurable auto-lock ensures your vault stays closed even when you forget. PRIVATE BY DEFAULT Contacts in StealthContacts never appear in your system address book, never show up in Spotlight or other apps, and never sync anywhere you haven't chosen. They stay exactly where you put them. PRIVACY SCREEN StealthContacts hides its contents the moment you switch away — in the app switcher, in notifications, over your shoulder. No accidental glimpses. CONTACT GROUPS* Color-coded groups keep your vault organized. Filter by group to find exactly who you're looking for. iCLOUD SYNC* Sync your vault privately across your Apple devices via iCloud — completely separate from iCloud Contacts. Your stealth contacts never appear in your system address book on any device. FREE & PREMIUM Download free and start adding contacts right away. Upgrade to premium to unlock groups, iCloud sync, and caller ID. Premium is available as a monthly or yearly subscription, or a one-time lifetime purchase. * Requires premium Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Date Formatter4 screens
Stealth Contacts4 screens

Verdict

The call

The clearest difference is in-app purchases: Date Formatter at none against Stealth Contacts's 3. Date Formatter also leads on iOS requirement (11.0 vs 18.0). Stealth Contacts's advantage is update cadence (monthly vs every 29 months). On price, 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. Stealth Contacts sells 3 in-app purchases, starting at $0.99 per month. Date Formatter asks for nothing beyond the download.

UpkeepUpdate frequency

Date Formatter ships an update every 29 months, Stealth Contacts monthly. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 6 level
Date Formatter versus Stealth Contacts: the parameters behind the verdict, then further details
ParameterDate FormatterStealth Contacts
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 29 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better18.0
Further details — not scored
Size13 MB9 MB
Age rating4+4+
DeveloperHonghao ZhangSftwrfactory LLC

In-app purchases

None

Date Formatter

No in-app purchases

3 purchases

Stealth Contacts

Subscriptions2
  • Stealth Contacts Monthly$0.991 Month
  • Stealth Contacts Yearly$9.991 Year
One-time1
  • Stealth Contacts Lifetime$17.99

Questions

Is Date Formatter free?
Date Formatter is free to download, with no in-app purchases.
Is Stealth Contacts free?
Stealth Contacts is free to download, with in-app purchases available.
Do Date Formatter or Stealth Contacts have ads?
Neither Date Formatter nor Stealth Contacts shows ads.
Which is updated more often, Date Formatter or Stealth Contacts?
Date Formatter ships an update every 29 months, and Stealth Contacts monthly. Most recently, Date Formatter was updated on November 1, 2026 and Stealth Contacts on October 31, 2026.

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