Comparison

Charging Time vs Big Thumb Keyboard

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

Head to head
About

Charging Time

This utility app predicts how long it will take to charge your device to a specific level. It uses current charging status for accurate forecasts and allows management of charging data per charger. Receive notifications when your target charge is reached.

Highlights
  • Predict charging time to target level
  • Uses current charging status for forecasts
  • Manage charging data per charger
  • Notifications for target charge reached
  • Adjust expected charging time
  • Set calendar events for charging completion
  • Widget and Live Activity support
Features
Read full description

Charging Time is an app that predicts the time it takes to charge the device where the app is installed. 1.Predict how long it will take to reach a specified charge level. 2.The current charging status is used for the next charging prediction. 3.You can manage charging forecast data for each charger. 4.Predictions can also be made for stages in the middle of a specified target charge level. 5.You will be notified by sound and vibration when you reach the target level. 6.There is a function to adjust the expected time. 7.You can set an alarm for the expected time as a calendar event. 8.You can use Widget function. 9.You can use Live Activity. When it is not in the charging state, it calculates the expected time. Charging prediction starts automatically when the battery is charged. Simple screen operation, easy charge level setting, with slider adjustment function when charging time deviates. You can measure the charging time according to the charging environment, such as the charger you use or charging while using. You can also predict charging during charging. If you give permission to use the calendar, you can set the estimated charging time to the calendar event even when the app is inactive. When the target time is reached, a calendar event will start and notify you.

About

Big Thumb Keyboard

This keyboard app uses a unique gesture-based system to allow typing with a single thumb. It offers features like an 8-way swipe system, consistent button size, one-handed mode, phonetic logic, and advanced autocorrect.

Highlights
  • 8-Way Swipe System
  • Consistent Button Size
  • True One-Handed Typing
  • Phonetic Hangul Logic
  • Pro-Grade Autocorrect
  • Haptic Feedback
  • Quick Symbols & Numbers
Features
Read full description

Tired of Typos? Meet the Keyboard Built for Your Thumb. Stop squinting at tiny keys and struggling with "fat finger" errors. Big Thumb Keyboard is a revolutionary, gesture-based typing system that lets you access every character (letters, numbers, and symbols) with a single thumb, without ever switching layouts. ONE PRICE. NO SUBSCRIPTIONS. NO ADS. In a world of monthly fees, we keep it simple: Pay once, type forever. No data collection. No tracking. Just a better way to type. WHY CHOOSE BIG THUMB? - The 8-Way Swipe System: Every button is a powerhouse. Swipe in any of 8 directions (up, down, corners, etc.) to instantly type different letters. It’s faster, more accurate, and feels like magic once you find your rhythm. - Perfect Muscle Memory: Unlike other keyboards that shrink or grow, our buttons stay a consistent 5mm wide on every device. Whether you’re on an iPhone SE or an iPad Pro, your thumb always knows exactly where to go. - True One-Handed Typing: Carrying a coffee? Holding a baby? Just swipe the Shift key to toggle One-Handed Mode and fly through your messages with ease. - Phonetic "Hangul" Logic: We’ve grouped letters by how they sound (Lips, Tongue, Throat). It’s a scientifically backed system that makes learning the layout surprisingly intuitive. - Pro-Grade Autocorrect: Advanced AI learns your patterns. Made a mistake? Our 2-second Instant Undo lets you revert a correction with one tap of the backspace. FEATURES YOU’LL LOVE - Haptic Feedback: Feel the "click" of every swipe. Distinct vibrations for different directions help you type without even looking at the screen. - Quick Symbols & Numbers: No more hunting through sub-menus. Access punctuation and math symbols instantly through control swipes. - Privacy First: We don't want your data. Your keystrokes stay on your device—period. Full Access is only required for haptic feedback and local settings. IS THIS FOR YOU? - Large Hands? Finally, keys you can actually hit. - Accessibility Needs? Designed for those who need high-precision, low-mobility input. - Efficiency Junkies? Master the swipe and outpace standard QWERTY typists. 30-SECOND SETUP - Install the app. - Go to Settings → General → Keyboard. - Tap Keyboards → Add New Keyboard → Big Thumb Keyboard. - (Optional) Allow Full Access to enable haptic feedback. Join the typing revolution. Download Big Thumb Keyboard today and take back your screen!

Screenshots

Charging Time4 screens
Big Thumb Keyboard4 screens

Verdict

The call

The clearest difference is review sentiment: Charging Time at 86% against Big Thumb Keyboard's 0%. Charging Time also leads on price (Free vs $2.99) and rating (3.9 vs 1.0). On ads, in-app purchases, 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

Charging Time is free to download; Big Thumb Keyboard costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Charging Time holds the better App Store score, 3.9 against 1.0. That said, the two scores are not equally well evidenced: Charging Time has 12 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 86% of Charging Time's written reviews are positive against 0% of Big Thumb Keyboard's.

UpkeepUpdate frequency

Charging Time ships an update every 3 weeks, Big Thumb Keyboard every 6 months. The most recent releases landed on October 24, 2026 and October 9, 2026 respectively.

Scorecard6 real differences · 4 level
Charging Time versus Big Thumb Keyboard: the parameters behind the verdict, then further details
ParameterCharging TimeBig Thumb Keyboard
PriceFree — better$2.99
Rating3.9 (12 ratings) — better1.0 (1 ratings)
Positive reviews85.7% of reviews — better0.0% of reviews
Number of ratings12 — better1
Update frequencyEvery 3 weeks — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.618.5 — better
Further details — not scored
Size2 MB44 MB
Age rating4+4+
Developermasaki individualBukdu Group, LLC

Customer experience

Charging Time

All ratings12 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews7 reviews
Positive85.7%
Neutral0.0%
Negative14.3%

Big Thumb Keyboard

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Charging Time

No in-app purchases

None

Big Thumb Keyboard

No in-app purchases

Questions

Is Charging Time free?
Charging Time is free to download, with no in-app purchases.
Is Big Thumb Keyboard free?
Big Thumb Keyboard costs $2.99, with no in-app purchases.
Which has better reviews, Charging Time or Big Thumb Keyboard?
Charging Time is rated higher. Charging Time averages 3.9 out of 5 from 12 ratings, while Big Thumb Keyboard averages 1.0 from 1 ratings.
Do Charging Time or Big Thumb Keyboard have ads?
Neither Charging Time nor Big Thumb Keyboard shows ads.
Which is updated more often, Charging Time or Big Thumb Keyboard?
Charging Time ships an update every 3 weeks, and Big Thumb Keyboard every 6 months. Most recently, Charging Time was updated on October 24, 2026 and Big Thumb Keyboard on October 9, 2026.

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