# Implen NanoPhotometer vs DIGITCA

The clearest difference is in-app purchases: Implen NanoPhotometer at none against DIGITCA's 1. Implen NanoPhotometer also leads on iOS requirement (10.0 vs 17.0). DIGITCA's advantage is update cadence (every 2 days vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. DIGITCA sells 1 one-off in-app purchase. Implen NanoPhotometer asks for nothing beyond the download.

Implen NanoPhotometer ships an update every 3 months, DIGITCA every 2 days. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Implen NanoPhotometer | DIGITCA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/digitca/id6766617649/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 54 MB | 59 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Implen Inc.](https://appshunter.io/developer/988716674) | [matous petran](https://appshunter.io/developer/1628862850) |

## What reviewers say

### Implen NanoPhotometer

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

**Features:** macOS Compatibility

**In-app purchases:** none


### DIGITCA

[App page](https://appshunter.io/ios/app/digitca/id6766617649)

This app provides a persistent, scrollable tape calculator that remembers every entry. Edit past numbers and see totals update live. It includes conversion tools and natural language input for calculations.

**Highlights:** Persistent scrollable tape, Editable calculations, Autosave functionality, Unit and currency converter, Natural language input, Scientific keyboard, Interactive Home Screen widget

**Features:** Family Sharing, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DIGITCA Full | $5.99 | one-time |


## Frequently asked questions

### Is Implen NanoPhotometer free?

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

### Is DIGITCA free?

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

### Do Implen NanoPhotometer or DIGITCA have ads?

Neither Implen NanoPhotometer nor DIGITCA shows ads.

### Which is updated more often, Implen NanoPhotometer or DIGITCA?

Implen NanoPhotometer ships an update every 3 months, and DIGITCA every 2 days. Most recently, Implen NanoPhotometer was updated on October 9, 2026 and DIGITCA on October 6, 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.*