# OneCalc vs Programmer's Calculator

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.

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.

## The numbers

| Metric | OneCalc | Programmer's Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (5.1K ratings)](https://appshunter.io/ios/app/onecalc-all-in-one-calculator/id1324977193/reviews) | **[4.7 (927 ratings)](https://appshunter.io/ios/app/programmers-calculator/id1467603958/reviews)** |
| Number of ratings | **5.1K** | 927 |
| Positive reviews | **71.8% of reviews** | 62.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 6 MB | 21 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [tasser gyati](https://appshunter.io/developer/1324926550) | [Yuma Kitasei](https://appshunter.io/developer/1199831834) |

## What reviewers say

### OneCalc

[App page](https://appshunter.io/ios/app/onecalc-all-in-one-calculator/id1324977193)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 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

**What reviewers complain about**

- 🐛 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

**Reported bugs**

- Crashes when using the 'More' section
- Incorrect date duration calculations
- Paid version still shows ads

**Requested features**

- 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


### Programmer's Calculator

[App page](https://appshunter.io/ios/app/programmers-calculator/id1467603958)

This application serves as a versatile calculator designed for programmers. It supports conversions and calculations across binary, decimal, and hexadecimal number systems.

**Highlights:** Binary number support, Decimal number support, Hexadecimal number support, Number system conversions, Programmer-focused calculations

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium member | $0.99 | per month |

**What reviewers like**

- 🚀 Straightforward and highly functional
- 👍 Easy to use
- 💡 Useful for coding and calculations
- 👍 Practical for binary and hex operations
- 👍 Displays decimal, binary, and hex simultaneously

**What reviewers complain about**

- 🐛 Ads take too long to click out of
- 🐛 Subscription did not remove ads
- 🐛 App freezes and crashes
- 🔋 High battery consumption

**Reported bugs**

- Login screen freezes
- Incompatible with older devices

**Requested features**

- 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


## Frequently asked questions

### Is OneCalc free?

OneCalc is free to download, with no in-app purchases.

### Is Programmer's Calculator free?

Programmer's Calculator is free to download, with in-app purchases available.

### Which has better reviews, OneCalc or Programmer's Calculator?

Programmer's Calculator is rated higher. OneCalc averages 4.6 out of 5 from 5.1K ratings, while Programmer's Calculator averages 4.7 from 927 ratings.

### Do OneCalc or Programmer's Calculator have ads?

OneCalc shows ads; Programmer's Calculator does not.

### Which is updated more often, OneCalc or Programmer's Calculator?

OneCalc ships an update every 3 months, and Programmer's Calculator every 6 months. Most recently, OneCalc was updated on November 2, 2026 and Programmer's Calculator on November 3, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*