# Panecal Scientific Calculator vs Drillstring Toolbox

The clearest difference is rating: Panecal Scientific Calculator at 4.8 against Drillstring Toolbox's 3.3. Panecal Scientific Calculator also leads on update cadence (every 2 months vs every 39 months) and ratings volume (1.9K vs 3). Drillstring Toolbox's advantage is ads (none vs shown) and review sentiment (100% vs 76%). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Panecal Scientific Calculator holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: Panecal Scientific Calculator has 1.9K ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 76% of Panecal Scientific Calculator's written reviews are positive against 100% of Drillstring Toolbox's, so the app with the better star average is not the one people write more warmly about.

Panecal Scientific Calculator ships an update every 2 months, Drillstring Toolbox every 39 months. The most recent releases landed on September 24, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Panecal Scientific Calculator | Drillstring Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1.9K ratings)](https://appshunter.io/ios/app/panecal-scientific-calculator/id668500803/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/drillstring-toolbox/id1068605189/reviews) |
| Number of ratings | **1.9K** | 3 |
| Positive reviews | 75.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 39 months |
| Monetization | Ad-supported | **Free** |
| Size | 34 MB | 1 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Noriyasu Kutsuzawa](https://appshunter.io/developer/668500806) | [Bureau Veritas North America, Inc.](https://appshunter.io/developer/1770295442) |

## What reviewers say

### Panecal Scientific Calculator

[App page](https://appshunter.io/ios/app/panecal-scientific-calculator/id668500803)

This app functions as a scientific calculator, enabling users to input and edit complex formulas with ease. It supports formula history, variable memory, and various number system conversions for accurate calculations.

**Highlights:** Formula editing with cursor and swipe, Reuse past formulas, Variable memory for calculations, Binary, octal, decimal, hexadecimal conversion, M+/M- memory functions, Angle unit settings (DEG, RAD, GRAD)

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great button layout
- 👍 Intuitive and user-friendly
- 👍 Powerful scientific functions
- 👍 Convenient display and history
- 👍 Useful for various fields (construction, engineering, etc.)

**What reviewers complain about**

- 🐛 Calculation errors in some cases
- 🐛 Glitches and crashes reported
- 🔍 Lack of engineering prefixes
- 📺 Ads can be intrusive
- 🔍 Suboptimal button placement and sizing

**Reported bugs**

- Inability to switch back from Bin mode
- Calculation history not scrolling properly
- Inconsistent behavior with certain operations

**Requested features**

- Unit conversion tools
- Customizable font and icon
- Ability to rotate screen
- More advanced programming features
- Improved order of operations handling


### Drillstring Toolbox

[App page](https://appshunter.io/ios/app/drillstring-toolbox/id1068605189)

This utility app calculates drill-stem load capacities based on API connections and sizes. It also provides makeup torque and tensile capacity, as well as tensile and torsion capacities for drill pipe tubes.

**Highlights:** Drill-stem load capacity calculation, API connection selection, Makeup torque calculation, Tensile capacity calculation, Drill pipe tube capacities

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Panecal Scientific Calculator free?

Panecal Scientific Calculator is free to download, with no in-app purchases.

### Is Drillstring Toolbox free?

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

### Which has better reviews, Panecal Scientific Calculator or Drillstring Toolbox?

Panecal Scientific Calculator is rated higher. Panecal Scientific Calculator averages 4.8 out of 5 from 1.9K ratings, while Drillstring Toolbox averages 3.3 from 3 ratings.

### Do Panecal Scientific Calculator or Drillstring Toolbox have ads?

Panecal Scientific Calculator shows ads; Drillstring Toolbox does not.

### Which is updated more often, Panecal Scientific Calculator or Drillstring Toolbox?

Panecal Scientific Calculator ships an update every 2 months, and Drillstring Toolbox every 39 months. Most recently, Panecal Scientific Calculator was updated on September 24, 2026 and Drillstring Toolbox on September 5, 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.*