Comparison

ClevCalc vs App Lock™

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

Head to head
About

ClevCalc

This comprehensive calculator app offers a wide range of tools for everyday calculations, from basic arithmetic and scientific functions to unit and currency conversions. It includes specialized calculators for loans, health, fuel costs, GPA, and more, all within a clean and user-friendly interface.

Highlights
  • Scientific calculator
  • Unit converter
  • Currency converter
  • Loan calculator
  • Health calculator (BMI, BMR)
  • Date calculator
  • GPA calculator
Features
Read full description

This calculator allows you to easily handle all the calculations necessary for everyday life with a single application. A free calculator app with a clean interface and practical functions! List of calculators currently supported: 1. Calculator ( + Scientific Calculator ) • Supports the four fundamental arithmetic operations, square, root, parentheses and percentage operations. • Supports scientific operations such as trigonometric, exponential and logarithmic functions. • Possible to modify incorrectly entered expressions with a freely movable cursor. • Simple and easy. • History available. 2. Unit Converter • Supports length, weight, width, volume, time, temperature, pressure, speed, fuel efficiency, and the amount of data. • Supports all unit conversions commonly used in everyday life. 3. Currency Converter • Supports 135 currencies in the world, including dollar, euro, yen, yuan, etc. • Automatically calculates using the real time exchange rate. 4. Percentage Calculator • You can easily calculate the percentage increase or decrease. • You can also calculate what percentage one number is of another. 5. Discount Calculator • Get a discount price by entering the original price and the discount rate. 6. Loan Calculator • You can calculate the total interest and total payments by entering the loan principal and interest rate. 7. Date Calculator • A feature that calculates the specific date or anniversary to be remembered! 8. Health Calculator • You can measure the body mass index (BMI) and the basal metabolic rate (BMR). 9. Automobile Fuel Cost Calculator • You can calculate the fuel costs required for driving a car or traveling. • Enter a distance and a fuel efficiency to get a fuel cost. 10. Fuel Efficiency Calculator • Enter the amount of fuel used to get the fuel efficiency. 11. GPA Calculator • You can correctly calculate your GPA! 12. Tip Calculator • The tip amount to be added will be automatically calculated if you enter the billing amount and tip percentage. • There is a function not to calculate tips on tax. • You may calculate the amount per person by dividing final amount by the number of people. 13. Sales Tax Calculator • Get a total price by entering the original price and the tax rate. 14. Unit Price Calculator • Enter the price and the quantity and you will get the unit price. • You can compare unit prices of various goods. 15. World Time Converter • Transforms the time of 400 or more cities around the world. • Daylight savings time will also be reflected in this calculation. 16. Ovulation Calculator • Calculates the time of ovulation and fertility using the menstrual cycle! • You can also create notes by date. 17. Hexadecimal Converter • Converts between decimal and hexadecimal with ease and convenience. 18. Savings Calculator • If you enter deposit amount, interest rate and time period, the interest after tax and final savings balance will be calculated. [ Terms of Use ] https://www.apple.com/legal/internet-services/itunes/dev/stdeula [ Disclaimer ] Cleveni Inc. makes no warranty as to the accuracy or reliability or suitability of any calculation results or information provided through the ClevCalc app. Cleveni Inc. is not also responsible for any damages, direct or indirect, which may occur by the calculation results or information provided through the ClevCalc app.

About

App Lock™

Secure your digital life by locking apps, protecting photos and videos in a private vault, and browsing the web anonymously. Store contacts, passwords, and notes safely with passcode protection.

Highlights
  • Lock Apps
  • Photo & Video Vault
  • Private Browser
  • Secure Notes & Passwords
  • Passcode Protection
  • Custom Albums
Features
Read full description

Φ Lock your Apps to upgrade your Privacy. Φ Protect your Files in your personal secure Photo Album. Φ Store Photos, Videos, Notes, Contacts, Passwords... Φ Surf the web in security with the private browser in the vault. "Download to upgrade your Privacy and Security for your apps, photos and data!" More information: - Lock Apps - Move existing Photos & Videos from the Library into your photo vault. - Use the integrated camera to take Photos directly in the app. - Browse the internet without any trace with the Private Browser. - Store securely your Contacts, Passwords, Notes... - Lock down your files with passcode. E-mail recovery is available to back up password. - Simple interface and easy to use. - Create and organize custom Albums. - Full-screen viewing for photos and videos. Download now & improve your privacy! Please note: - To ensure maximum security, the app does not store your photos or data in any kind of servers or clouds. The app solely uses the internal storage of your device. If you delete the app, all your files and information saved in the app will also be deleted. If you need to delete the app, please make sure that you have exported your data before you delete the app. We can not recover your data. - Passcode recovery: we do not keep your passcode. It is only stored locally on your device. If you forget it, unfortunately we can not help. So if you feel you need a back-up of your passcode, please use the email recovery system or store it on your own. Stay Safe! Subscription information: - You can subscribe for unlimited access - Duration: weekly, monthly, yearly - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Terms of use: https://planecubes.com/terms/ Privacy policy: https://planecubes.com/privacy/

Screenshots

ClevCalc4 screens
App Lock™4 screens

Verdict

The call

The clearest difference is review sentiment: ClevCalc at 91% against App Lock™'s 19%. ClevCalc also leads on monetization model (free with in-app purchases vs subscription) and rating (4.7 vs 4.5). On price, update cadence, ads and in-app purchases 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. ClevCalc sells 3 in-app purchases, starting at $2.99 per month and App Lock™ sells 6 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

ClevCalc holds the better App Store score, 4.7 against 4.5. That said, the two scores are not equally well evidenced: ClevCalc has 14K ratings behind it against 2.6K, so its average is the more settled of the two. Written reviews point the same way: 91% of ClevCalc's written reviews are positive against 19% of App Lock™'s.

UpkeepUpdate frequency

ClevCalc ships an update monthly, App Lock™ every 5 weeks. The most recent releases landed on November 1, 2026 and October 29, 2026 respectively.

Scorecard5 real differences · 5 level
ClevCalc versus App Lock™: the parameters behind the verdict, then further details
ParameterClevCalcApp Lock™
PriceFreeFree
Rating4.7 (14K ratings) — better4.5 (2.6K ratings)
Positive reviews91.2% of reviews — better18.9% of reviews
Number of ratings14K — better2.6K
Update frequencyMonthly — betterEvery 5 weeks
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better16.0
Further details — not scored
Size117 MB41 MB
Age rating4+17+
DeveloperCleveni Inc.Plane Cubes

Customer experience

ClevCalc

All ratings13,801 ratings
Positive93.6%
Neutral2.7%
Negative3.7%
Written reviews1,414 reviews
Positive91.2%
Neutral2.5%
Negative6.3%

App Lock™

All ratings2,564 ratings
Positive87.1%
Neutral3.9%
Negative9.0%
Written reviews90 reviews
Positive18.9%
Neutral3.3%
Negative77.8%

User reviews

ClevCalc

From 14K App Store ratings

What we love

  • 👍 Easy to use
  • 🚀 Efficient calculations
  • 💡 Versatile features (currency, unit conversions, etc.)
  • 👍 Intuitive interface
  • 👍 Helpful for daily tasks

Room to improve

  • 💰 Subscription model too expensive
  • 🔍 Ads can be intrusive
  • 🐛 Occasional UI issues (e.g. ads blocking functionality)
  • 🔍 Lack of advanced features (e.g. RPN mode, binary calculator)

App Lock™

From 2.6K App Store ratings

What we love

  • ⭐ Amazing
  • 🔒 Privacy-focused
  • 📂 Useful for storing files

Room to improve

  • 🔐 Locked content behind paywall
  • 🤑 Expensive subscription
  • 🔍 Misleading app description
  • 🐛 Bugs and glitches
  • 🤯 Frustrating user experience

Bugs and requests

ClevCalc

Reported bugs

2 issues
  • Keystrokes not always registering
  • Compatibility issues with older devices

Requested features

4 requests
  • Dark mode option
  • Ability to save/recall calculations
  • More customization options
  • Integration with other apps/platforms

App Lock™

Reported bugs

3 issues
  • Content locked after free trial ends
  • Unable to access stored files even after subscription
  • App crashes or freezes frequently

Requested features

3 requests
  • Allow access to stored content without subscription
  • Provide clear information about subscription requirements
  • Improve app stability and fix bugs

In-app purchases

3 purchases

ClevCalc

Subscriptions2
  • Premium Subscription3 Days trial$2.991 Month
  • Premium Subscription3 Days trial$24.991 Year
One-time1
  • Premium version$13.99
6 purchases

App Lock™

Subscriptions6
  • Premium Access Weekly$3.997 Days
  • Hide Apps Pro Week3 Days trial$4.997 Days
  • Premium Access Monthly$7.991 Month
Show 3 more
  • Premium Access Yearly$19.991 Year
  • Start 7 Day Trial7 Days trial$19.991 Year
  • Hide Apps Pro Year$39.991 Year

Questions

Is ClevCalc free?
ClevCalc is free to download, with in-app purchases available.
Is App Lock™ free?
App Lock™ is free to download, with in-app purchases available.
Which has better reviews, ClevCalc or App Lock™?
ClevCalc is rated higher. ClevCalc averages 4.7 out of 5 from 14K ratings, while App Lock™ averages 4.5 from 2.6K ratings.
Do ClevCalc or App Lock™ have ads?
Both ClevCalc and App Lock™ show ads.
Which is updated more often, ClevCalc or App Lock™?
ClevCalc ships an update monthly, and App Lock™ every 5 weeks. Most recently, ClevCalc was updated on November 1, 2026 and App Lock™ on October 29, 2026.

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