# NilnocCalc vs Calca

The clearest difference is price: NilnocCalc at Free against Calca's $9.99. NilnocCalc also leads on rating (5.0 vs 4.5) and in-app purchases (none vs 2). Calca's advantage is ratings volume (153 vs 1). On update cadence, ads and device support there is nothing between them.

NilnocCalc is free to download; Calca costs $9.99 up front. Calca sells 2 one-off in-app purchases. NilnocCalc asks for nothing beyond the download.

NilnocCalc holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Calca has 153 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 100% of NilnocCalc's written reviews are positive against 76% of Calca's.

NilnocCalc ships an update every 3 months, Calca every 5 months. The most recent releases landed on June 1, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | NilnocCalc | Calca |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nilnoccalc/id576052957/reviews)** | [4.5 (153 ratings)](https://appshunter.io/ios/app/calca/id635757879/reviews) |
| Number of ratings | 1 | **153** |
| Positive reviews | **100.0% of reviews** | 76.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 5 MB | 78 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [John Conlin](https://appshunter.io/developer/576052961) | [Krueger Systems, Inc.](https://appshunter.io/developer/299293363) |

## What reviewers say

### NilnocCalc

[App page](https://appshunter.io/ios/app/nilnoccalc/id576052957)

A powerful 64-bit calculator with multiple number system displays, trigonometric functions, and customizable button colors. It offers unit conversions, binary float display, and permutation/combination calculations.

**Highlights:** 64-bit calculation engine, Hex, Octal, Binary displays, Full trigonometric functions, Customizable button colors and effects, Unit conversion constants, Binary Float display, Combinations and Permutations

**Features:** macOS Compatibility

**In-app purchases:** none


### Calca

[App page](https://appshunter.io/ios/app/calca/id635757879)

This app is an advanced symbolic calculator and text editor. It solves equations, simplifies expressions, and allows you to explain your work alongside calculations. Calculations update instantly as you type, and all data is stored as plain text for easy sharing and device syncing.

**Highlights:** Symbolic calculation, Equation solving, Expression simplification, Markdown text editor, Real-time updates, Unit and currency conversion, Matrix operations

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6-Month Optional Patronage | $4.99 | one-time |
| 12-Month Optional Patronage | $7.99 | one-time |

**What reviewers like**

- 💡 Unique blend of text editor and calculator
- 📝 Markdown support for documentation
- 🔄 Dynamic recalculation of all values
- ⚙️ Powerful mathematical and algebraic capabilities
- 📊 Unit conversion and unit-aware calculations

**What reviewers complain about**

- 🐛 Magic Keyboard input bugs on iPad
- ⚠️ Appears abandoned or poorly maintained
- 🐛 Text selection issues with external keyboards
- 📱 iPad landscape mode problems
- 🐛 Cursor jumping and screen jumping during editing

**Reported bugs**

- Magic Keyboard causes number input to overwrite instead of append
- Text selection before numbers triggers increment/decrement instead of selecting
- Cursor jumps forward and backward with external keyboards
- iPad Pro keyboard truncation in portrait mode
- Arrow key (=>) doesn't work in landscape mode

**Requested features**

- Files app and document browser integration
- Dropbox and Google Drive support
- Date calculation functionality
- Looping and iteration support
- User-defined function storage in separate files


## Frequently asked questions

### Is NilnocCalc free?

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

### Is Calca free?

Calca costs $9.99, and also offers in-app purchases.

### Which has better reviews, NilnocCalc or Calca?

NilnocCalc is rated higher. NilnocCalc averages 5.0 out of 5 from 1 ratings, while Calca averages 4.5 from 153 ratings.

### Do NilnocCalc or Calca have ads?

Neither NilnocCalc nor Calca shows ads.

### Which is updated more often, NilnocCalc or Calca?

NilnocCalc ships an update every 3 months, and Calca every 5 months. Most recently, NilnocCalc was updated on June 1, 2026 and Calca on September 25, 2026.

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