# WellDrive vs Drill Bit Nozzle Calculator

The clearest difference is update cadence: Drill Bit Nozzle Calculator at every 2 months against WellDrive's every 9 months. Drill Bit Nozzle Calculator also leads on iOS requirement (9.0 vs 11.0). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for WellDrive against 5.0 for Drill Bit Nozzle Calculator. Both are backed by a comparable volume of ratings — 2 and 2 respectively.

WellDrive ships an update every 9 months, Drill Bit Nozzle Calculator every 2 months. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | WellDrive | Drill Bit Nozzle Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/welldrive/id869205638/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/drill-bit-nozzle-calculator/id1144121595/reviews) |
| Number of ratings | 2 | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 44 MB | 55 MB |
| Requires iOS | 11.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [WellDrive](https://appshunter.io/developer/1312911913) | [NOV Inc.](https://appshunter.io/developer/578550101) |

## What reviewers say

### WellDrive

[App page](https://appshunter.io/ios/app/welldrive/id869205638)

Access and manage well-related documents and files directly from your mobile device. Browse entries, download necessary files, and upload new documents or edits made in other applications.

**Highlights:** Browse wells, entries, and files, Download documents, Upload files, Edit and upload documents

**Features:** macOS Compatibility

**In-app purchases:** none


### Drill Bit Nozzle Calculator

[App page](https://appshunter.io/ios/app/drill-bit-nozzle-calculator/id1144121595)

Calculate essential drilling parameters like bit TFA, pressure drop, and impact force using bit size, flow rate, and mud weight. Offers a reverse calculation to determine nozzle sizes for a specific total flow area and number of nozzles.

**Highlights:** Calculate bit TFA, Calculate pressure drop, Calculate HSI, Calculate Impact Force, Reverse nozzle size calculation, Input bit size, flow rate, nozzles, mud weight

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is WellDrive free?

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

### Is Drill Bit Nozzle Calculator free?

Drill Bit Nozzle Calculator is free to download, with no in-app purchases.

### Which has better reviews, WellDrive or Drill Bit Nozzle Calculator?

WellDrive and Drill Bit Nozzle Calculator are both rated 5.0 out of 5 on the App Store, from 2 and 2 ratings respectively.

### Do WellDrive or Drill Bit Nozzle Calculator have ads?

Neither WellDrive nor Drill Bit Nozzle Calculator shows ads.

### Which is updated more often, WellDrive or Drill Bit Nozzle Calculator?

WellDrive ships an update every 9 months, and Drill Bit Nozzle Calculator every 2 months. Most recently, WellDrive was updated on November 1, 2026 and Drill Bit Nozzle Calculator on November 2, 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.*