Comparison

Customer Database vs CalcBox

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

Head to head
About

Customer Database

Manage customer information securely on your mobile device, separate from personal contacts. Sync data with a MySQL server for backup and multi-device access. Includes GDPR tools, customer grouping, birthday management, and newsletter capabilities.

Highlights
  • Secure customer management
  • MySQL server sync
  • GDPR tools
  • Customer grouping and birthdays
  • Newsletter creation
  • VCF/CSV import/export
  • Incoming call identification
Features
Read full description

This simple customer database application is designed for small companies for easy and secure customer management on smartphones and tablets, separated from private contacts. It is possible to sync your data with a (self-hosted) MySQL server to prevent loss or defect of your mobile device. This also allows to sync the data with multiple devices. In addition to that, it has tools for the EU-GDPR and you can group customers, manage customers birthdays and vouchers, write newsletters, import customers from VCF files and export your data into VCF or CSV files. Additionally, this app adapts the Dark Mode and has the ability to save customer images. The app shows the names of people saved in the customer database for incoming calls if you activate this in the iOS settings under "Phone" -> "Block and identify calls". Because of its high flexibility, the application is also often used in non-enterprise areas, such as teachers' management of parent contact information. Additional features that can be unlocked via in-app purchase: -> Custom Fields: also drop down selection lists and sorting by these fields is supported. -> "Input-Only-Mode": Optional activatable mode that allows only data entry. For example, the device can be handed to showroom visitors. -> Calendar: Manage customer appointments. Customers can insert the appointment directly into their calendar using a QR code. -> File Attachments: Attach up to 20 files to a customer. -> Design Options: Allows you to set your own title bar color. Terms of Use for the Sync Feature: https://georg-sieber.de/?page=app-customerdb-terms This app is Open Source: https://github.com/schorschii/customerdb-ios

About

CalcBox

This app combines numerous essential calculation tools into a single, user-friendly interface. It handles everything from basic arithmetic and unit conversions to financial planning, health tracking, and academic performance. Simplify your daily tasks with this comprehensive utility.

Highlights
  • Basic and scientific calculations
  • Extensive unit and currency conversion
  • Financial calculators (loan, deposit, tip, discount)
  • Health and fitness trackers (BMI, ovulation)
  • Time and date calculations (D-Day, world clock)
  • Academic tools (GPA calculator)
Read full description

CalcBox makes life more convenient with its user-friendly design and smart calculation functions. It efficiently handles various real-life calculations, integrating multiple tools into one app, and features a simple, intuitive interface that anyone can use. Download CalcBox now and simplify your life! ▷ Calculator Perform basic arithmetic and simple scientific calculations quickly. Equations and results can be saved for future use. ▷ Unit Converter Convert units like area, length, temperature, weight, volume, data, time, speed, pressure, force, energy, fuel efficiency, and more, making it versatile for various needs. ▷ D-Day Calculator Calculate days leading up to important dates or see how many days have passed since an anniversary. ▷ World Clock Converter Check the time in cities around the world or calculate the time across different time zones. ▷ Currency Calculator Quickly convert exchange rates for international travel or transactions, with offline use supported via saved rates. ▷ BMI Calculator Enter your height and weight to calculate your BMI and BMR, and visualize results through saved graphs. ▷ Unit Price Calculator Compare prices by calculating the unit price of multiple products. Save and modify results as needed. ▷ Tip Calculator Conveniently calculate tips for meals or services, including per-person splits. ▷ Percentage Calculator Useful for financial transactions, accurately calculating discounts, and taxes. ▷ Discount Calculator Easily find the final price after discounts, including VAT calculations. ▷ Loan Calculator Check financial status by calculating loan repayments and interest. ▷ Deposit and Savings Calculator Calculate future savings by applying deposit amounts and interest rates, including simple and compound interest calculations. ▷ VAT Calculator Accurately calculate the final price including VAT. ▷ Fuel Efficiency Calculator Determine your car's fuel efficiency based on mileage and fuel consumption. ▷ Fuel Price Calculator Calculate your car’s fuel cost using mileage and gas prices. ▷ Ovulation Date Calculator Predict ovulation and fertile windows, supporting family planning and cycle tracking with health notes. ▷ GPA Calculator Track academic performance by calculating GPA, aiding in academic planning. ▷ Age Calculator Calculate your age by entering your birth date, with the option to save and edit results. ▷ Pace Calculator Determine running pace by entering distance and time, including treadmill speed conversion. [Disclaimer] Realbyte Inc. disclaims any responsibility for the accuracy, appropriateness, or reliability of the data provided by the CalcBox app. The company is not liable for errors, omissions, or any damages arising from defects, delays, interruptions, or reliance on the app's information. Subscription pricing and terms: CalcBox offers a $0.99/month auto-renewing monthly subscription and a $9.99/year auto-renewing annual subscription, which removes ads and allows users to choose additional app design themes while maintaining an active subscription. Payment will be charged to the credit card connected to your iTunes Account when you confirm the initial subscription purchase. Subscriptions automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. Your account will be charged for renewal within 24-hours prior to the end of the current period, and the cost of the renewal will be identified. You may manage your subscription and auto-renewal may be turned off by going to your Account Settings after the purchase. Read more about our terms and conditions here: https://www.apple.com/legal/internet-services/itunes/dev/stdeula Privacy Policy: https://calcbox.realbyteapps.com/privacy.html

Screenshots

Customer Database4 screens
CalcBox4 screens

Verdict

The call

The clearest difference is ads: Customer Database at none against CalcBox's shown. Customer Database also leads on iOS requirement (13.0 vs 16.6). CalcBox's advantage is review sentiment (93% vs 58%) and ratings volume (380 vs 47). On price, rating, update cadence 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. Customer Database sells 8 in-app purchases, starting at $1.99 per month and CalcBox sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Customer Database against 4.8 for CalcBox. That said, the two scores are not equally well evidenced: CalcBox has 380 ratings behind it against 47, so its average is the more settled of the two. Written reviews are what separate them: 58% of Customer Database's written reviews are positive against 93% of CalcBox's.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

Scorecard4 real differences · 6 level
Customer Database versus CalcBox: the parameters behind the verdict, then further details
ParameterCustomer DatabaseCalcBox
PriceFreeFree
Rating4.6 (47 ratings)4.8 (380 ratings) — better
Positive reviews58.3% of reviews92.5% of reviews — better
Number of ratings47380 — better
Update frequencyEvery 3 weeksEvery 3 weeks
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.6
Further details — not scored
Size3 MB72 MB
Age rating4+4+
DeveloperGeorg SieberRealbyte Inc.

Customer experience

Customer Database

All ratings47 ratings
Positive89.4%
Neutral4.3%
Negative6.4%
Written reviews12 reviews
Positive58.3%
Neutral0.0%
Negative41.7%

CalcBox

All ratings362 ratings
Positive95.3%
Neutral1.9%
Negative2.8%
Written reviews107 reviews
Positive92.5%
Neutral4.7%
Negative2.8%

Bugs and requests

Customer Database

Not enough reviews yet to summarise bugs or requests.

CalcBox

Reported bugs

3 issues
  • Ads cannot be closed with X button
  • Excessive ads appearing after initial use period
  • Deceptive ad behavior after one week of use

Requested features

6 requests
  • One-time payment option to remove ads permanently
  • Premium ad-free version (like Money Manager app)
  • Set as default calculator option
  • Deposit/savings calculator with day-level precision
  • Bitcoin/cryptocurrency support
Show 1 more
  • Account checking integration with calculation features

In-app purchases

8 purchases

Customer Database

Subscriptions1
  • Cloud Access License$1.991 Month
One-time7
  • Design Options$1.99
  • Commercial Usage$4.99
  • Custom Fields$4.99
Show 4 more
  • Input-Only Mode & App Lock$4.99
  • Calendar$4.99
  • Files$5.99
  • More than 500 Customers$8.99
2 purchases

CalcBox

Subscriptions2
  • 1 Month Subscription3 Days trial$0.991 Month
  • 1 Year Subscription3 Days trial$9.991 Year

Questions

Is Customer Database free?
Customer Database is free to download, with in-app purchases available.
Is CalcBox free?
CalcBox is free to download, with in-app purchases available.
Which has better reviews, Customer Database or CalcBox?
CalcBox is rated higher. Customer Database averages 4.6 out of 5 from 47 ratings, while CalcBox averages 4.8 from 380 ratings.
Do Customer Database or CalcBox have ads?
CalcBox shows ads; Customer Database does not.
Which is updated more often, Customer Database or CalcBox?
Customer Database ships an update every 3 weeks, and CalcBox every 3 weeks. Most recently, Customer Database was updated on November 3, 2026 and CalcBox on October 30, 2026.

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