# Calculator # vs Drillstring Toolbox

The clearest difference is rating: Calculator # at 4.6 against Drillstring Toolbox's 3.3. Calculator # also leads on update cadence (every 2 months vs every 39 months) and ratings volume (36K vs 3). Drillstring Toolbox's advantage is review sentiment (100% vs 60%) and in-app purchases (none vs 6). On price and device support there is nothing between them.

Both are free to download. Calculator # sells 6 in-app purchases, starting at $1.49 per month. Drillstring Toolbox asks for nothing beyond the download.

Calculator # holds the better App Store score, 4.6 against 3.3. That said, the two scores are not equally well evidenced: Calculator # has 36K ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 60% of 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.

Calculator # ships an update every 2 months, Drillstring Toolbox every 39 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calculator # | Drillstring Toolbox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (36K ratings)](https://appshunter.io/ios/app/calculator/id458535080/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/drillstring-toolbox/id1068605189/reviews) |
| Number of ratings | **36K** | 3 |
| Positive reviews | 59.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 39 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 57 MB | 1 MB |
| Requires iOS | **12.1** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Incpt.Mobis](https://appshunter.io/developer/445261166) | [Bureau Veritas North America, Inc.](https://appshunter.io/developer/1770295442) |

## What reviewers say

### Calculator #

[App page](https://appshunter.io/ios/app/calculator/id458535080)

This multi-function calculator offers basic to advanced scientific and algebraic computations. It includes features like handwriting recognition, equation solvers, and 2D graphing, making it suitable for students and professionals. In-app purchases unlock advanced capabilities.

**Highlights:** Math Photos Solver, Handwriting Recognition, AI Math Problem Solver, Mathematical Display, Equation Solvers, 2D Graphing, Algebraic Functions

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Upgrade 1 Month | $1.49 | per month |
| PRO Upgrade 3 Months | $2.99 | per 3 months |
| PRO + Recognition 1 Month | $4.99 | per month |
| PRO + Recognition 3 Months | $11.99 | per 3 months |
| 250 AI Recognition & Queries | $0.99 | one-time |
| 600 AI Recognition & Queries | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Powerful functionality
- 💡 Helpful for math classes
- ⭐ Great for students
- 👌 Works like a real calculator

**What reviewers complain about**

- 🔍 Confusing interface after update
- 📢 Too many intrusive ads
- 💰 Paywall for advanced features
- 🐛 Incorrect calculations
- 🔇 Loud audio ads

**Reported bugs**

- Crashes when trying to use certain functions
- Handwriting recognition not working reliably
- Inability to input negative numbers

**Requested features**

- Add option to turn off animation
- Improve ad placement to avoid obstructing usage
- Provide more transparency on paid features


### 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 Calculator # free?

Calculator # is free to download, with in-app purchases available.

### Is Drillstring Toolbox free?

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

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

Calculator # is rated higher. Calculator # averages 4.6 out of 5 from 36K ratings, while Drillstring Toolbox averages 3.3 from 3 ratings.

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

Calculator # shows ads; Drillstring Toolbox does not.

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

Calculator # ships an update every 2 months, and Drillstring Toolbox every 39 months. Most recently, Calculator # was updated on October 27, 2026 and Drillstring Toolbox on October 24, 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.*