# Combine Fluids vs WellCalc

The clearest difference is price: WellCalc at Free against Combine Fluids's $0.99. WellCalc also leads on update cadence (weekly vs monthly). Combine Fluids's advantage is in-app purchases (none vs 2) and chart position (#170 vs unranked). On ads and device support there is nothing between them.

WellCalc is free to download; Combine Fluids costs $0.99 up front. WellCalc sells 2 in-app purchases, starting at $4.99 per month. Combine Fluids asks for nothing beyond the download.

Combine Fluids ships an update monthly, WellCalc weekly. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Combine Fluids | WellCalc |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/combine-fluids/id1458907903/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Paid | — |
| Best chart rank | **#170** | — |
| Size | 85 MB | 13 MB |
| Requires iOS | **10.0** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GoodStamp](https://appshunter.io/developer/717537129) | [Ryan Tinklepaugh](https://appshunter.io/developer/1883444651) |

## What reviewers say

### Combine Fluids

[App page](https://appshunter.io/ios/app/combine-fluids/id1458907903)

**Currently charting:** #170 Top Paid · Utilities (US App Store)

This utility app helps oil and gas professionals quickly calculate fluid volume combinations. It allows users to input various fluid types and density requirements, saving different mix possibilities for specific wells.

**Highlights:** Combine up to 10 fluid types, Save fluid mix possibilities per well, Calculate volume combinations, Input mud density requirements, Supports volume limitations or not

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

**In-app purchases:** none


### WellCalc

[App page](https://appshunter.io/ios/app/wellcalc/id6761081416)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WellCalc Pro Monthly | $4.99 | per month |
| WellCalc Pro Yearly | $29.99 | per year |


## Frequently asked questions

### Is Combine Fluids free?

Combine Fluids costs $0.99, with no in-app purchases.

### Is WellCalc free?

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

### Do Combine Fluids or WellCalc have ads?

Neither Combine Fluids nor WellCalc shows ads.

### Which is updated more often, Combine Fluids or WellCalc?

Combine Fluids ships an update monthly, and WellCalc weekly. Most recently, Combine Fluids was updated on October 24, 2026 and WellCalc on October 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.*