# Dr. DE vs unit.

The clearest difference is in-app purchases: Dr. DE at none against unit.'s 2. unit.'s advantage is chart position (#176 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. unit. sells 2 one-off in-app purchases. Dr. DE asks for nothing beyond the download.

## The numbers

| Metric | Dr. DE | unit. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (16 ratings)](https://appshunter.io/ios/app/dr-de/id954796004/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 55.6% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Monetization | Free | — |
| Best chart rank | — | **#176** |
| Size | 33 MB | 2 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Pegasus Vertex, Inc.](https://appshunter.io/developer/954796003) | [APP LABS LLC](https://appshunter.io/developer/1846489907) |

## What reviewers say

### Dr. DE

[App page](https://appshunter.io/ios/app/dr-de/id954796004)

This mobile toolbox simplifies complex drilling engineering calculations. It offers a comprehensive suite of 29 functions across 11 categories, eliminating the need for handbooks and improving efficiency for engineers and technicians.

**Highlights:** 29 drilling engineering functions, 11 functional groups, Bit hydraulics calculations, Hole cleaning analysis, Well control solutions, Unit conversion tools, Tank capacity calculations

**Features:** macOS Compatibility

**In-app purchases:** none


### unit.

[App page](https://appshunter.io/ios/app/unit-unit-converter/id6814284608)

**Currently charting:** #176 Top Paid · Utilities (US App Store)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 14-day Trial | Free | one-time |
| Full Unlock | $6.99 | one-time |


## Frequently asked questions

### Is Dr. DE free?

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

### Is unit. free?

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

### Do Dr. DE or unit. have ads?

Neither Dr. DE nor unit. shows ads.

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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.*