# All in One Calculator vs Dev Calc

The clearest difference is rating: All in One Calculator at 4.7 against Dev Calc's 2.0. All in One Calculator also leads on in-app purchases (none vs 1) and ads (none vs shown). Dev Calc's advantage is iOS requirement (13.0 vs 18.0). On price and device support there is nothing between them.

Both are free to download. Dev Calc sells 1 in-app purchase, starting at $1.99 per month. All in One Calculator asks for nothing beyond the download.

All in One Calculator holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: All in One Calculator has 186 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 85% of All in One Calculator's written reviews are positive against 60% of Dev Calc's.

All in One Calculator ships an update monthly, Dev Calc every 2 months. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | All in One Calculator | Dev Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (186 ratings)](https://appshunter.io/ios/app/all-in-one-calculator/id664569132/reviews)** | [2.0 (2 ratings)](https://appshunter.io/ios/app/dev-calc-developer-calculator/id1576503219/reviews) |
| Number of ratings | **186** | 2 |
| Positive reviews | **84.8% of reviews** | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 70 MB | 51 MB |
| Requires iOS | 18.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ramon Rivas](https://appshunter.io/developer/664569135) | [Toshiya Hondo](https://appshunter.io/developer/1571875732) |

## What reviewers say

### All in One Calculator

[App page](https://appshunter.io/ios/app/all-in-one-calculator/id664569132)

This comprehensive calculator app offers a wide range of functionalities for everyday and complex calculations. It features multiple calculator views, a unit converter, and a detailed history log. Designed for ease of use and accessibility, it supports multitasking and various input methods.

**Highlights:** Multiple calculator views (Standard, RPN, Programmer), Extensive unit converter with nearly 500 units, Detailed calculation history with annotation, Multitasking and drag-and-drop support, Adjustable precision and keyboard shortcuts, Light and Dark appearance options

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

**In-app purchases:** none

**What reviewers like**

- 👍 Comprehensive conversion tables
- 💡 Advanced features (binary, hex, octal)
- 👍 Multiple calculator types
- 👍 Logic formulas support
- 👍 Free and ad-free

**What reviewers complain about**

- 🐛 Nagging to log in to iPhone account
- 🐛 Unresponsive keypad at times
- 🐛 App 'blinks' on iPad
- 🐛 Two taps required for number entry
- 🐛 Exponent function issues

**Reported bugs**

- Constantly nags to login to iPhone account
- Keypad is unresponsive
- App 'blinks' on iPad Pro
- Two taps of enter key required
- Exponent function (y^x) yields 0

**Requested features**

- Electrical circuit calculator/chart for AC/DC circuits
- Support for signed integers (16, 32, 64 bit) in programmer mode


### Dev Calc

[App page](https://appshunter.io/ios/app/dev-calc-developer-calculator/id1576503219)

This app assists developers and programmers with immediate numeric conversions between binary, octal, decimal, and hexadecimal formats. It also provides tools for generating color codes from RGB, HSL, and HSV values, with a color picker and preset options.

**Highlights:** Numeric conversion (Bin, Oct, Dec, Hex), Signed/Unsigned options, Adjustable bit sizes (8, 16, 32, 64), RGB, HSL, HSV color code generation, Color picker, Preset color options

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads (Monthly) | $1.99 | per month |


## Frequently asked questions

### Is All in One Calculator free?

All in One Calculator is free to download, with no in-app purchases.

### Is Dev Calc free?

Dev Calc is free to download, with in-app purchases available.

### Which has better reviews, All in One Calculator or Dev Calc?

All in One Calculator is rated higher. All in One Calculator averages 4.7 out of 5 from 186 ratings, while Dev Calc averages 2.0 from 2 ratings.

### Do All in One Calculator or Dev Calc have ads?

Dev Calc shows ads; All in One Calculator does not.

### Which is updated more often, All in One Calculator or Dev Calc?

All in One Calculator ships an update monthly, and Dev Calc every 2 months. Most recently, All in One Calculator was updated on October 8, 2026 and Dev Calc on October 7, 2026.

---

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