# NEC Box Fill Calc vs ChronosMap

The clearest difference is in-app purchases: ChronosMap at none against NEC Box Fill Calc's 1. ChronosMap also leads on update cadence (every 10 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

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

NEC Box Fill Calc ships an update monthly, ChronosMap every 10 days. The most recent releases landed on October 3, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | NEC Box Fill Calc | ChronosMap |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Size | 2 MB | 34 MB |
| Requires iOS | **17.0** | 18.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [光 杨](https://appshunter.io/developer/1891134953) | [洪霆 郝](https://appshunter.io/developer/1741449543) |

## What reviewers say

### 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 |


### ChronosMap

[App page](https://appshunter.io/ios/app/chronosmap/id6778398973)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is NEC Box Fill Calc free?

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

### Is ChronosMap free?

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

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

Neither NEC Box Fill Calc nor ChronosMap shows ads.

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

NEC Box Fill Calc ships an update monthly, and ChronosMap every 10 days. Most recently, NEC Box Fill Calc was updated on October 3, 2026 and ChronosMap on October 15, 2026.

---

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