Comparison

Time & Date Calculator ++ vs Decibel Meter Plus Pro

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

Head to head
About

Time & Date Calculator ++

This app provides a fast and accurate way to perform calculations involving dates and times, eliminating the need for manual methods or spreadsheets. It's ideal for professionals who need precise results for work hours, payroll, billing, and more, with a clean interface and offline functionality.

Highlights
  • Add and subtract time instantly
  • Convert time formats (HH:MM, decimal hours, total minutes)
  • Accurate payroll and billing calculations
  • Persistent calculation history
  • Clean, calculator-style interface
  • Works fully offline
Features
Read full description

Thank you for choosing Time & Date. Your attention to hours, dates, and schedules deserves a careful tool, and we appreciate you putting this app to work. Focused calculators help you check shifts, plan deadlines, compare dates, review flight timing, and handle everyday time math without a spreadsheet or crowded general calculator. TIME AND DURATION TOOLS - Add and subtract hours, minutes, seconds, and mixed durations. - Compare times in 12-hour AM/PM or 24-hour format. - Calculate elapsed time across midnight. - Total entries in HH:MM, HH:MM:SS, MM:SS, and DD:HH:MM:SS columns. - Multiply or divide durations for rates, batches, lessons, routes, workouts, and estimates. - Convert between hours, minutes, seconds, decimal hours, and clock formats. - Compare date-and-time rows and check local or UTC results. TIME COLUMN CHARTS - Turn entries from the four Time Column calculators into line, bar, or scatter charts. - Follow consistent Entry 1, Entry 2, and later labels in calculator order. - Read duration values in familiar time units. - Scroll horizontally through longer entry lists without crowding the labels. - Share chart data and its ordered entries as a PDF. DATES, DEADLINES, AND SCHEDULES - Find the difference between two dates in years, months, weeks, weekdays, or days. - Add or subtract an interval to see where a deadline or appointment lands. - Count business days and working hours using the workdays and work windows you choose. - Build countdown plans with steps, buffers, and optional workday limits. - Save important dates with titles and tags, with valid edits saved as you work. - Search, sort, edit, share, and delete tracked dates. - View saved dates in a year calendar. WORK, PAYROLL, AND FLIGHT CHECKS - Calculate shift length from clock-in and clock-out times. - Account for unpaid breaks and common shift-rounding choices. - Review raw time, paid time, overtime, and rounding differences. - Keep weekly shift rows together and export a CSV summary. - Check pilot time, ETE, ETA, fuel, endurance, holding time, duty, and rest information. HISTORY THAT STAYS USEFUL - Save named calculator records with text details and creation times. - Search by saved name or calculator, then delete individual records when they are no longer needed. - Scroll smoothly through larger histories as more records load automatically. - Keep History text focused without storing or displaying calculator images. - Work on iPad with master and detail navigation kept visible. SHARE, BACKUP, AND DATA CONTROL - Export calculator snapshots and tracked dates in Project JSON. - Export History as JSON, CSV, or PDF. - Import History JSON while skipping records with the same saved data. - Export and import tracked dates in their own JSON format. - Share supported calculator results, tracked dates, and charts as PDF. - Transfer up to 10,000 History records at a time. - Keep JSON imports within an explicit 100 MB safety limit. - Let larger transfers work without blocking normal interaction, then receive a completion message. - Reset all saved app data from Settings after reviewing an unrecoverable-action warning. - Access advanced calculators, Favorites, and data transfer with Pro; free use has daily calculation limits. Time & Date is useful for employees checking timesheets, managers reviewing schedules, freelancers billing by time, students planning study blocks, technicians totaling service time, pilots reviewing duty windows, and anyone who wants dependable date and duration answers without building a complex formula. For monthly subscriptions: Monthly Pro is a 1-month auto-renewable subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Thank you again for using the app thoughtfully. Your attention to the small details is what makes a dependable record worth keeping, and this release gives those saved calculations a cleaner place to live, move, and manage.

About

Decibel Meter Plus Pro

Measure the sound levels around you with this utility app. It displays average, peak, and max values, offers decibel exposure time guidelines, and provides information on noise-induced hearing loss. The app also allows data recording and export for analysis.

Highlights
  • Measure sound levels
  • Display average, peak, and max values
  • Decibel exposure time guidelines
  • Information on noise-induced hearing loss
  • Record and export data
  • Calibrate measurements
  • Universal app support
Features
Read full description

Decibel Meter Plus Pro turns your iPhone or iPad into a clean and easy-to-use sound level meter. Measure the noise around you in real time, view current, average, max, and peak dB readings, save measurement sessions, and export reports when you need to keep a record. Whether you want to check a quiet room, monitor everyday environmental noise, compare sound levels over time, or save a simple noise report, Decibel Meter Plus Pro gives you a clear and modern way to do it. KEY FEATURES • Real-time decibel meter View live sound levels with a large, easy-to-read meter. • Current, average, max, and peak values Quickly understand how sound levels change during a measurement session. • Live noise trend See noise changes over time instead of relying on a single number. • Save measurement sessions Keep useful sound level records for later review. • Session history Browse saved sessions with date, duration, average level, max level, and noise category. • Session reports Review key sound level stats, noise trend charts, location notes, and report details. • Export & share reports Export saved reports as an image, PDF, or CSV file. A limited number of free report exports is included. Unlock Unlimited Reports with a one-time purchase for unlimited exports. • Optional location saving Save location information only with sessions you manually save. • Calibration Adjust readings to better match a reference sound meter. • Noise level guide Learn common sound levels and tips for better measurements. • iPhone and iPad support Enjoy a redesigned interface that works beautifully on both iPhone and iPad. • 30+ languages The app is now localized for users around the world. • Privacy-friendly design Audio is processed on your device and is not uploaded. UNLIMITED REPORTS Unlimited Reports is an optional one-time unlock for users who want unlimited image, PDF, and CSV report exports. No subscription is required. SUPPORT If you have questions, feedback, or need help with purchases or report exports, please contact us at: ipixeltech@gmail.com IMPORTANT NOTE Decibel Meter Plus Pro uses the built-in microphone on your device. Readings are intended for general reference and everyday noise checks. For certified workplace testing, legal compliance, or professional acoustic measurement, please use certified sound level equipment.

Screenshots

Time & Date Calculator ++4 screens
Decibel Meter Plus Pro4 screens

Verdict

The call

The clearest difference is price: Time & Date Calculator ++ at Free against Decibel Meter Plus Pro's $2.99. Time & Date Calculator ++ also leads on review sentiment (84% vs 53%) and update cadence (every 3 weeks vs every 2 months). Decibel Meter Plus Pro's advantage is iOS requirement (15.0 vs 17.6). On ads, in-app purchases 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

Time & Date Calculator ++ is free to download; Decibel Meter Plus Pro costs $2.99 up front. Time & Date Calculator ++ sells 2 in-app purchases, starting at $1.99 per month and Decibel Meter Plus Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Time & Date Calculator ++ ships an update every 3 weeks, Decibel Meter Plus Pro every 2 months. The most recent releases landed on October 30, 2026 and October 29, 2026 respectively.

Scorecard5 real differences · 5 level
Time & Date Calculator ++ versus Decibel Meter Plus Pro: the parameters behind the verdict, then further details
ParameterTime & Date Calculator ++Decibel Meter Plus Pro
PriceFree — better$2.99
Rating—3.7 (81 ratings) — better
Positive reviews83.7% of reviews — better52.8% of reviews
Number of ratings—81 — better
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterPaid
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS17.615.0 — better
Further details — not scored
Size11 MB12 MB
Age rating4+4+
DeveloperVerosocial Studio华芳 张

Customer experience

Time & Date Calculator ++

Written reviews98 reviews
Positive83.7%
Neutral2.0%
Negative14.3%

Decibel Meter Plus Pro

All ratings81 ratings
Positive70.4%
Neutral3.7%
Negative25.9%
Written reviews127 reviews
Positive52.8%
Neutral7.9%
Negative39.4%

Bugs and requests

Time & Date Calculator ++

Reported bugs

11 issues
  • Calculation list hidden under selection menu in right-handed mode
  • Keypad hidden in left-handed mode
  • 'Number of days between dates' calculator not working
  • Tapping 'today' button no longer enters today's date
  • Calculate button does nothing for 'number of days between dates'
Show 6 more
  • Calculator selection menu covers other elements
  • App crashes on opening after update
  • Menu stopped working after update
  • Repeatedly crashes
  • Subtraction functionality issues
  • Email sharing not working

Requested features

10 requests
  • Add decimal hours back
  • Bring back option for permanent left-side selection menu
  • Get rid of pointless back arrow
  • Add milliseconds support
  • Allow multiple time entries for adding up hours
Show 5 more
  • Add option to print working outs
  • Set a default screen on opening
  • Auto tab between fields
  • Larger buttons
  • Make buttons bigger

Decibel Meter Plus Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Time & Date Calculator ++

Subscriptions1
  • Monthly Pro$1.991 Month
One-time1
  • Lifetime Pro Unlock$14.99
1 purchases

Decibel Meter Plus Pro

One-time1
  • Unlimited Reports$4.99

Questions

Is Time & Date Calculator ++ free?
Time & Date Calculator ++ is free to download, with in-app purchases available.
Is Decibel Meter Plus Pro free?
Decibel Meter Plus Pro costs $2.99, and also offers in-app purchases.
Do Time & Date Calculator ++ or Decibel Meter Plus Pro have ads?
Neither Time & Date Calculator ++ nor Decibel Meter Plus Pro shows ads.
Which is updated more often, Time & Date Calculator ++ or Decibel Meter Plus Pro?
Time & Date Calculator ++ ships an update every 3 weeks, and Decibel Meter Plus Pro every 2 months. Most recently, Time & Date Calculator ++ was updated on October 30, 2026 and Decibel Meter Plus Pro on October 29, 2026.

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