# Achromator vs NEC Box Fill Calc

The clearest difference is in-app purchases: Achromator at none against NEC Box Fill Calc's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. NEC Box Fill Calc sells 1 one-off in-app purchase. Achromator asks for nothing beyond the download.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Achromator | NEC Box Fill Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 1 MB | 2 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [HANS-JURGEN GRAF GROTE](https://appshunter.io/developer/1787606413) | [光 杨](https://appshunter.io/developer/1891134953) |

## What reviewers say

### Achromator

[App page](https://appshunter.io/ios/app/achromator/id6739949388)

**In-app purchases:** none


### NEC Box Fill Calc

[App page](https://appshunter.io/ios/app/nec-box-fill-calc/id6767993285)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Inspection Cards Lifetime Unlock | $7.99 | one-time |


## Frequently asked questions

### Is Achromator free?

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

### Is NEC Box Fill Calc free?

NEC Box Fill Calc is free to download, with in-app purchases available.

### Do Achromator or NEC Box Fill Calc have ads?

Neither Achromator nor NEC Box Fill Calc shows ads.

### Which is updated more often, Achromator or NEC Box Fill Calc?

Achromator ships an update monthly, and NEC Box Fill Calc monthly. Most recently, Achromator was updated on November 4, 2026 and NEC Box Fill Calc on October 31, 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.*