Comparison

24 vs Atomic Clock

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

Head to head
About

24

Effortlessly add, subtract, and calculate time differences using 24-hour (military) time. Designed for professionals managing schedules and logs, it offers automatic clock wrapping and a persistent time feature for convenience.

Highlights
  • Add/subtract 24-hour time
  • Calculate time differences
  • Persistent time feature
  • Automatic clock wrapping
  • Simple, modern interface
Features
Read full description

24-Hour Time Calculator makes adding, subtracting, and scoring 24-hour (military) time fast and effortless. Whether you're a pilot, dispatcher, shift worker, or anyone managing schedules and logs, this app is designed for you. Enter start and end times, calculate time differences, or quickly solve 24-hour time math for any need. Key Features: • Instantly add or subtract 24-hour (military) time • Quickly calculate time differences for shifts, schedules, or logs • Persistent Time: Easily save and reuse a constant value - no more retyping the same number again and again • Automatic Clock Wrapping: Results always stay within 24-hour format - no more confusing answers like "25:00" • Simple, modern interface - no clutter, no ads • Designed for aviation, logistics, transportation, shift work, and anyone who needs accurate time math • Works great with typical flight plan and scheduling formats ----- How It Works: 1. Enter your starting time. (Example: "13:15" for 1:15 PM.) 2. Add or subtract the desired value. (Example: add "2:50" to get "16:05".) 3. Use the persistent time feature to save a commonly used number (like an offset or fixed block time), so you never have to re-enter it. 4. All results are automatically wrapped to the 24-hour clock - no more odd answers like "25:00". ----- Stop struggling with mental math or spreadsheets - 24-Hour Time Calculator helps you get the job done with confidence, every time.

About

Atomic Clock

This utility provides highly accurate time synchronization using NTP. View precise time with millisecond detail, compare your device clock to network time, and customize display styles. It's privacy-focused with no tracking or analytics.

Highlights
  • NTP-based time synchronization
  • Millisecond detail
  • Local time and UTC display
  • Offset and latency indicators
  • Automatic sync
  • Eight clock styles
  • Customizable colors
  • Privacy-focused
Features
Read full description

Atomic Clock – Precision Time is a professional precision clock and NTP time synchronization utility for anyone who needs highly accurate time directly on their device. Use reliable network time synchronization to view precise time with millisecond-level detail. Compare your device clock with network time, check sync offset and latency, switch between local time and UTC, and keep the screen on when you need a stable reference clock. Key features: • NTP-based time synchronization • Millisecond or 1/60-second detail • Local time and UTC display • Device offset and network latency indicators • Automatic sync with configurable intervals • Eight clock styles: circular dots, analog, minimalist, binary, neon glow, flip clock, Nixie tubes, and orbital dial • Custom accent colors and multi-color display • Night mode and keep-screen-on option • Privacy-focused: no account, no analytics, no tracking Atomic Clock – Precision Time is built for precise timing, clock drift checks, latency awareness, and a clean daily precision clock. Privacy Policy: https://5gotogo.github.io/AtomicClock-privacy/privacy-policy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

243 screens
Atomic Clock4 screens

Verdict

The call

The clearest difference is price: Atomic Clock at Free against 24's $2.99. Atomic Clock also leads on ratings volume (7 vs 2). 24's advantage is in-app purchases (none vs 2) and chart position (#177 vs unranked). On rating, 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

Atomic Clock is free to download; 24 costs $2.99 up front. Atomic Clock sells 2 in-app purchases, starting at $5.99 per month. 24 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for 24 against 4.9 for Atomic Clock. Both are backed by a comparable volume of ratings — 2 and 7 respectively.

Scorecard5 real differences · 6 level
24 versus Atomic Clock: the parameters behind the verdict, then further details
Parameter24Atomic Clock
Price$2.99Free — better
Rating5.0 (2 ratings) — better4.9 (7 ratings)
Positive reviews—100.0% of reviews
Number of ratings27 — better
Update frequency—Every 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
Best chart rank#177 — better—
DevicesiPhone, iPad — betteriPhone
Requires iOS18.517.6 — better
Further details — not scored
Size0 MB9 MB
Age rating4+4+
DeveloperRichard Montoya家宝 戴

Customer experience

24

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Atomic Clock

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

24

No in-app purchases

2 purchases

Atomic Clock

Subscriptions2
  • AtomicClock Pro Monthly7 Days trial$5.991 Month
  • AtomicClock Pro Monthly7 Days trial$19.991 Year

Questions

Is 24 free?
24 costs $2.99, with no in-app purchases.
Is Atomic Clock free?
Atomic Clock is free to download, with in-app purchases available.
Which has better reviews, 24 or Atomic Clock?
24 is rated higher. 24 averages 5.0 out of 5 from 2 ratings, while Atomic Clock averages 4.9 from 7 ratings.
Do 24 or Atomic Clock have ads?
Neither 24 nor Atomic Clock shows ads.

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