# Concentrations vs LabCalc

The clearest difference is in-app purchases: Concentrations at none against LabCalc's 1. LabCalc's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.5). On price, update cadence and ads there is nothing between them.

Both are free to download. LabCalc sells 1 one-off in-app purchase. Concentrations asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 29, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Concentrations | LabCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | Every 3 months |
| Size | 7 MB | 68 MB |
| Requires iOS | 18.5 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Marcal Casas Cartagena](https://appshunter.io/developer/468150889) | [Biplav Parajuli](https://appshunter.io/developer/1798197573) |

## What reviewers say

### Concentrations

[App page](https://appshunter.io/ios/app/concentrations/id468150886)

**In-app purchases:** none


### LabCalc

[App page](https://appshunter.io/ios/app/labcalc-lab-calculators/id6756105793)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LabCalc Pro | $4.99 | one-time |


## Frequently asked questions

### Is Concentrations free?

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

### Is LabCalc free?

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

### Do Concentrations or LabCalc have ads?

Neither Concentrations nor LabCalc shows ads.

### Which is updated more often, Concentrations or LabCalc?

Concentrations ships an update every 3 months, and LabCalc every 3 months. Most recently, Concentrations was updated on October 29, 2026 and LabCalc on October 28, 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.*