# Implen NanoPhotometer vs Mass Molarity Calculator

The clearest difference is price: Implen NanoPhotometer at Free against Mass Molarity Calculator's $2.99. Implen NanoPhotometer also leads on update cadence (every 3 months vs every 29 months) and iOS requirement (10.0 vs 13). On ads, in-app purchases and device support there is nothing between them.

Implen NanoPhotometer is free to download; Mass Molarity Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Implen NanoPhotometer ships an update every 3 months, Mass Molarity Calculator every 29 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | Implen NanoPhotometer | Mass Molarity Calculator |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 29 months |
| Size | 54 MB | 1 MB |
| Requires iOS | **10.0** | 13 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Implen Inc.](https://appshunter.io/developer/988716674) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Implen NanoPhotometer

[App page](https://appshunter.io/ios/app/implen-nanophotometer/id988716675)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mass Molarity Calculator

[App page](https://appshunter.io/ios/app/mass-molarity-calculator/id1351095833)

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

**In-app purchases:** none


## Frequently asked questions

### Is Implen NanoPhotometer free?

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

### Is Mass Molarity Calculator free?

Mass Molarity Calculator costs $2.99, with no in-app purchases.

### Do Implen NanoPhotometer or Mass Molarity Calculator have ads?

Neither Implen NanoPhotometer nor Mass Molarity Calculator shows ads.

### Which is updated more often, Implen NanoPhotometer or Mass Molarity Calculator?

Implen NanoPhotometer ships an update every 3 months, and Mass Molarity Calculator every 29 months. Most recently, Implen NanoPhotometer was updated on October 26, 2026 and Mass Molarity Calculator on October 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*