# Atom Calculator vs National Storage Smart Entry

The clearest difference is price: National Storage Smart Entry at Free against Atom Calculator's $2.99. National Storage Smart Entry also leads on update cadence (every 3 weeks vs every 35 months). Atom Calculator's advantage is iOS requirement (12.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

National Storage Smart Entry is free to download; Atom Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Atom Calculator ships an update every 35 months, National Storage Smart Entry every 3 weeks. The most recent releases landed on October 26, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Atom Calculator | National Storage Smart Entry |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.8 (5 ratings)](https://appshunter.io/ios/app/national-storage-smart-entry/id1507037327/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 64.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 35 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 13 MB | 71 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 17+ |
| Developer | [Gorasiya Vishal Nanjibhai](https://appshunter.io/developer/1287086933) | [National Storage](https://appshunter.io/developer/1507037326) |

## What reviewers say

### Atom Calculator

[App page](https://appshunter.io/ios/app/atom-calculator/id1457529377)

**Features:** macOS Compatibility

**In-app purchases:** none


### National Storage Smart Entry

[App page](https://appshunter.io/ios/app/national-storage-smart-entry/id1507037327)

Access storage facilities and individual units without physical keys. Enjoy a contactless and secure move-in experience. Currently exclusive to National Storage Robina.

**Highlights:** Keyless access to storage center, Keyless access to storage unit, Contact-free move-in, Enhanced security, Digital access

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Atom Calculator free?

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

### Is National Storage Smart Entry free?

National Storage Smart Entry is free to download, with no in-app purchases.

### Do Atom Calculator or National Storage Smart Entry have ads?

Neither Atom Calculator nor National Storage Smart Entry shows ads.

### Which is updated more often, Atom Calculator or National Storage Smart Entry?

Atom Calculator ships an update every 35 months, and National Storage Smart Entry every 3 weeks. Most recently, Atom Calculator was updated on October 26, 2026 and National Storage Smart Entry on November 7, 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.*