# CAL vs OneNS

The clearest difference is update cadence: OneNS at every 2 weeks against CAL's every 41 months. CAL's advantage is iOS requirement (9.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CAL ships an update every 41 months, OneNS every 2 weeks. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | CAL | OneNS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.8 (6 ratings)](https://appshunter.io/ios/app/onens/id1619937291/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 29 MB | 106 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Cogent Holdings Pte Ltd](https://appshunter.io/developer/1518737136) | [MINDEF/SAF](https://appshunter.io/developer/523577540) |

## What reviewers say

### CAL

[App page](https://appshunter.io/ios/app/cal-vms/id1518737137)

**In-app purchases:** none


### OneNS

[App page](https://appshunter.io/ios/app/onens/id1619937291)

This app provides a centralized digital platform for National Service (NS) related services. Users can manage their NS details, apply for deferments, book IPPT, and track their progress. It aims to make the NS experience more convenient and engaging.

**Highlights:** Digital NS services portal, QR Code/Geolocation check-in, View ICT and Mobilisation details, Apply for deferment, Book IPPT, Track NS milestones and awards

**In-app purchases:** none


## Frequently asked questions

### Is CAL free?

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

### Is OneNS free?

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

### Do CAL or OneNS have ads?

Neither CAL nor OneNS shows ads.

### Which is updated more often, CAL or OneNS?

CAL ships an update every 41 months, and OneNS every 2 weeks. Most recently, CAL was updated on October 25, 2026 and OneNS on October 27, 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.*