Comparison

CalcVerter vs Charge Countdown

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

Head to head
About

CalcVerter

This comprehensive utility app offers a vast array of tools for calculations, conversions, and scientific exploration. It features customizable calculators, unit and base converters, time zone tools, and a science hub with constants and a periodic table. Personalize your experience with themes, widgets, and advanced statistics.

Highlights
  • Customizable calculators with multiple registers
  • Extensive unit and base conversion tools
  • Time zone and date calculation utilities
  • Science hub with constants and periodic table
  • Password, UUID, and random number generators
  • QR code creation and scanning
  • Advanced statistics and data visualization
Features
Read full description

CalcVerter – The Ultimate All in one Calculator and Converter One app. Endless possibilities. CalcVerter is your all-in-one powerhouse for calculations, conversions, and scientific exploration—designed to be the only tool you’ll ever need. Powerful Calculators - Create multiple calculators with custom registers, layouts, themes, and settings - Swipe effortlessly between calculators for a seamless workflow - Access over 500 built-in formula calculators across Geometry, Health, Finance, Physics, Engineering, and more - Build and share your own formula calculators. Conversions Made Simple - Unit Converter: 30 categories with favorites and sorting options - Base Converter: Convert between bases 2–64 instantly - Timezone Converter: Switch between time zones with detailed insights - Date and Time Tools: Calculate differences, ages, add/subtract dates, and more Science and Knowledge Hub - Constants: Over 350 organized constants (Astronomical, Mathematical, Atomic, Universal) - Periodic Table: Explore elements with detailed data, isotopes, and spectra - Planets: Discover celestial details and calculate your weight on other worlds - Solubility Tables and Hydrocarbons: Rich reference data at your fingertips Generators and Utilities - Strong Password Generator and UUID Generator - Random Number Generator for any scenario - QR Code Tools: Create and scan codes for websites, Wi-Fi, mail, and more - Word Counter and Tip Calculator for everyday tasks Advanced Statistics and Visualization - Descriptive statistics: Mean, Median, Mode, Standard Deviation, and more - Probability calculators for single and multiple events - Interactive charts: histograms, pie charts, box-and-whisker plots, and more Colors and Design Tools - Browse popular color palettes with detailed formats including HEX, RGB, HSB, HSL, XYZ, CMYK and more - Create custom color collections for projects - Convert between color formats with ease - Generate color codes for each color that can be used in Swift, Objective-C, SwiftUI, Kotlin, CSS and more Personalization and Extras - Widgets for quick access to calculators and converters - Extensive settings: number formatters, themes, filters, and more - Maths tables for quick reference - Built-in search to find any tools, calculators, converters and more eacily CalcVerter isn’t just another calculator—it’s a complete toolkit for professionals, students, and everyday users. Download now and experience the app that truly rules them all. Feel free to send any suggestions, report errors, or bugs to the support email below to make CalcVerter even better and more useful. loaysetrak.software@outlook.com.au Terms of Use: https://www.apple.com/legal/internet-services/itunes/appstore/dev/stdeula/

About

Charge Countdown

This app precisely calculates how long your device needs to charge to a specific percentage. It intelligently accounts for charging speed, current battery status, and power consumption to provide an accurate countdown. Optimized for iPhone and iPad, it offers an intuitive and ad-free experience for managing your battery.

Highlights
  • Precise charging time countdown
  • Intelligent calculation based on charging speed
  • Optimized for iPhone and iPad
  • Intuitive and user-friendly design
  • Offline functionality
  • No advertising or data tracking
Features
Read full description

How much longer is my iPhone charging? Charging time calculates your iPhone charging time and shows you the remaining time as a battery countdown that ticks along second by second. Below it you'll see the time of day when your battery will be full: "Full at 15:00". You don't have to calculate all the way to 100%. Set your own charging target – 70%, 80% or completely full – and the charging duration adjusts instantly. It works the other way round too: move the slider until the time matches your appointment, and you'll know how full the battery will be by then. Handy when you're about to head out. WHAT THE APP CAN DO • Countdown in minutes and seconds while the iPhone charges • The time of day when the battery will be full • Charging target freely selectable, in one-percent steps • Charger slider: slow, normal or fast • Calculates with the real battery of your iPhone model • Charging curve from 0 to 100% – see how your iPhone charges • Seven tips to make your battery last longer • Ring showing the current battery level • Works with a cable and with wireless charging on a charging pad • Everything on one screen, no menus • Light and dark mode, switches automatically • For iPhone and iPad, in a single purchase HOW DOES THE LADEZEIT APP WORK? The app doesn't work with a blanket figure, it works with your device: it reads the model identifier and therefore knows how big your battery really is and how much charging power it accepts – 40 models are stored, from the iPhone X to the iPhone 17 Pro Max, plus the iPads. Then there's your charger, because between an old five-watt plug and a USB-C fast charger there is a factor of seven. iOS doesn't tell apps what is connected, so you set it once with a slider – only then is the battery charging time correct. And because a battery doesn't charge evenly and throttles noticeably above 80%, the charging time calculator works through the path from 0 to 100% in twenty stages. That same calculation also draws the charging curve in the app. TIPS TO MAKE YOUR BATTERY LAST LONGER A new battery costs money and a few days without your phone. Charging time gathers seven tips in one place, right below the charging curve: battery level, temperature, charging overnight, full charges, heat from cases, low power mode and iOS updates. Each one in a single sentence, without having to search through guides. NO ADS, NO TRACKING Charging time calculates everything directly on your device and makes no connection to the outside world at all: no servers, no trackers, no ads, no user account, no sign-up. The charging display works in airplane mode just as well as with Wi-Fi. The app is around 5 MB in size, available in 11 languages and runs on iPhone and iPad from iOS 18.2. Downloading the app is free. Full functionality is available via a one-time purchase or a subscription – the scope is the same for both. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ladezeit.app/datenschutz

Screenshots

CalcVerter4 screens
Charge Countdown4 screens

Verdict

The call

The clearest difference is rating: CalcVerter at 4.5 against Charge Countdown's 2.7. CalcVerter also leads on device support (4 vs 2). Charge Countdown's advantage is update cadence (every 5 days vs monthly). On price, review sentiment, ratings volume and ads 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. CalcVerter sells 16 in-app purchases, starting at $0.99 per month and Charge Countdown sells 4 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

CalcVerter holds the better App Store score, 4.5 against 2.7. Both are backed by a comparable volume of ratings — 13 and 6 respectively. Written reviews point the same way: 82% of CalcVerter's written reviews are positive against 76% of Charge Countdown's.

UpkeepUpdate frequency

CalcVerter ships an update monthly, Charge Countdown every 5 days. The most recent releases landed on August 27, 2026 and September 22, 2026 respectively.

Scorecard3 real differences · 7 level
CalcVerter versus Charge Countdown: the parameters behind the verdict, then further details
ParameterCalcVerterCharge Countdown
PriceFreeFree
Rating4.5 (13 ratings) — better2.7 (6 ratings)
Positive reviews81.8% of reviews — better76.5% of reviews
Number of ratings13 — better6
Update frequencyMonthlyEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad
Requires iOS17.0 — better18.2
Further details — not scored
Size161 MB5 MB
Age rating4+4+
Developerloay setrakLeonhard Hundschell

Customer experience

CalcVerter

All ratings13 ratings
Positive92.3%
Neutral0.0%
Negative7.7%
Written reviews11 reviews
Positive81.8%
Neutral0.0%
Negative18.2%

Charge Countdown

All ratings6 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews17 reviews
Positive76.5%
Neutral0.0%
Negative23.5%

In-app purchases

16 purchases

CalcVerter

Subscriptions3
  • 1 Month Premium$0.991 Month
  • 6 Months Premium$3.996 Months
  • 1 Year Premium$6.991 Year
One-time13
  • Premium (Previous Purchasers)Free
  • Small Tip$0.99
  • Elements Pack$1.99
Show 10 more
  • Generators Pack$1.99
  • Date & Time Pack$1.99
  • Developer Pack$1.99
  • Statistics Pack$1.99
  • Theme Pack$1.99
  • Converter Pack$2.99
  • Calculator Pack$2.99
  • Formulas Pack$2.99
  • Enormous Tip$6.99
  • Lifetime Premium$14.99
4 purchases

Charge Countdown

Subscriptions3
  • Charging Countdown - Battery3 Days trial$3.997 Days
  • Charge Countdown – 1 Month$3.991 Month
  • Charging Countdown – Battery$5.991 Year
One-time1
  • Charge Countdown – Unlimited$12.99

Questions

Is CalcVerter free?
CalcVerter is free to download, with in-app purchases available.
Is Charge Countdown free?
Charge Countdown is free to download, with in-app purchases available.
Which has better reviews, CalcVerter or Charge Countdown?
CalcVerter is rated higher. CalcVerter averages 4.5 out of 5 from 13 ratings, while Charge Countdown averages 2.7 from 6 ratings.
Do CalcVerter or Charge Countdown have ads?
Neither CalcVerter nor Charge Countdown shows ads.
Which is updated more often, CalcVerter or Charge Countdown?
CalcVerter ships an update monthly, and Charge Countdown every 5 days. Most recently, CalcVerter was updated on August 27, 2026 and Charge Countdown on September 22, 2026.

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