OneCalc vs Programmer's Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OneCalc
This app offers a comprehensive suite of over 40 calculators and unit converters for various needs, including finance, health, construction, and everyday math. It features standard, scientific, and specialized calculators for tasks like loan amortization, currency conversion, and material estimation.
- Over 40 calculators and unit converters
- Standard and scientific calculator functions
- Financial calculators (interest, loan, currency)
- Health calculators (BMI, calories, pace)
- Construction material calculators
- Date and time duration calculations
- Business and shopping calculators
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All-in-one Calculator is a free calculator app for iPhone and iPad featuring over 40+ calculators and unit converters categorized under finance, health, date & time, construction, shopping and everyday math. Simple yet powerful, the following features are built into this all-in-one calculator app:- STANDARD CALCULATOR • Includes percent key, negative sign, memory functions, brackets and history viewer. • Advanced mode includes functions for trigonometry, roots, exponents and logarithm found in scientific calculators. UNIT CONVERTER • Convert values between metric/ imperial units with conversion calculators for temperature, length, weight, area, volume and many more. FINANCIAL CALCULATORS • Interest calculators using simple and compound interest • Loan calculator with amortization schedule • Savings calculator to calculate future value and monthly savings amount • Currency converter HEALTH -Keep track of your body weight with these calculators:- • BMI calculator • Calories burnt calculator • Running Pace calculator EVERYDAY MATH • Percentage calculator • Fraction calculator • Rounding calculator • Area/ Volume calculator • Right-triangle calculator CONSTRUCTION -Estimate material requirements for small repair works/ DIY projects with these calculators:- • Brick calculator • Concrete calculator • Tiles calculator • Lumber volume calculator • Land area calculator DATE & TIME -Find duration between two date/ time values in months, weeks, days, hours, and minutes. • Date calculator (Also useful for age calculation) • Time calculator • Calculators to add/ subtract date and time BUSINESS -These calculators are useful when shopping and for those who run small business. • Profit margin calculator • Price markup calculator • Discount calculator • Tip and split calculator • Sales tax/ VAT calculator
Programmer's Calculator
This application serves as a versatile calculator designed for programmers. It supports conversions and calculations across binary, decimal, and hexadecimal number systems.
- Binary number support
- Decimal number support
- Hexadecimal number support
- Number system conversions
- Programmer-focused calculations
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A calculator for programmers that supports binary numbers, decimal numbers, and hexadecimal numbers. Terms of Use : https://norche.jp/app_terms.html Privacy Policy : https://norche.jp/app_policy.html
Screenshots
Verdict
The clearest difference is in-app purchases: OneCalc at none against Programmer's Calculator's 1. OneCalc also leads on update cadence (every 3 months vs every 6 months) and review sentiment (72% vs 62%). Programmer's Calculator's advantage is ads (none vs shown) and iOS requirement (10.0 vs 15.6). On price, rating, monetization model 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
Both are free to download. Programmer's Calculator sells 1 in-app purchase, starting at $0.99 per month. OneCalc asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.6 for OneCalc against 4.7 for Programmer's Calculator. That said, the two scores are not equally well evidenced: OneCalc has 5.1K ratings behind it against 927, so its average is the more settled of the two. Written reviews are what separate them: 72% of OneCalc's written reviews are positive against 62% of Programmer's Calculator's.
OneCalc ships an update every 3 months, Programmer's Calculator every 6 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | OneCalc | Programmer's Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (5.1K ratings) | 4.7 (927 ratings) — better |
| Positive reviews | 71.8% of reviews — better | 62.1% of reviews |
| Number of ratings | 5.1K — better | 927 |
| Update frequency | Every 3 months — better | Every 6 months |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 10.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | tasser gyati | Yuma Kitasei |
Customer experience
OneCalc
Programmer's Calculator
User reviews
OneCalc
From 5.1K App Store ratingsWhat we love
- 🚀 Excellent app with many handy extras
- 👍 Easy to use and one of the daily drivers
- 👍 Helps with work
- 👍 Great for calculations and conversions
- 👍 Includes fractions
Room to improve
- 🐛 Crashes when using the 'More' section
- 🐛 Incorrect date duration calculations
- 🔍 Ads can be intrusive and disrupt calculations
- 🔍 Confusing keyboard layout with underlined keys
- 🔍 Paid version still shows ads
Programmer's Calculator
From 927 App Store ratingsWhat we love
- 🚀 Straightforward and highly functional
- 👍 Easy to use
- 💡 Useful for coding and calculations
- 👍 Practical for binary and hex operations
- 👍 Displays decimal, binary, and hex simultaneously
Room to improve
- 🐛 Ads take too long to click out of
- 🐛 Subscription did not remove ads
- 🐛 App freezes and crashes
- 🔋 High battery consumption
Bugs and requests
OneCalc
Reported bugs
3 issues- Crashes when using the 'More' section
- Incorrect date duration calculations
- Paid version still shows ads
Requested features
7 requests- Add more than 2 slots for conversions
- Include a 'log' feature
- Add a 'simplify fractions' unit
- Improve the 'Date duration' calculator
- Add a 'Business' mode with cost, sell, and margin keys
Show 2 moreShow fewer
- Add a millimeters conversion option
- Implement a 'clear' button to easily delete fields
Programmer's Calculator
Reported bugs
2 issues- Login screen freezes
- Incompatible with older devices
Requested features
6 requests- Add octal support
- Implement RPN input mode
- Add 2's complement and bit shift functions
- Provide visual feedback on calculations
- Allow setting number of bits
Show 1 moreShow fewer
- Add landscape mode support
In-app purchases
OneCalc
No in-app purchases
Programmer's Calculator
- Premium member$0.991 Month
Questions
Is OneCalc free?
Is Programmer's Calculator free?
Which has better reviews, OneCalc or Programmer's Calculator?
Do OneCalc or Programmer's Calculator have ads?
Which is updated more often, OneCalc or Programmer's Calculator?
Other comparisons
