# NBKI Authenticator vs Casterly

The clearest difference is in-app purchases: NBKI Authenticator at none against Casterly's 2. NBKI Authenticator also leads on iOS requirement (15.0 vs 17.6). Casterly's advantage is update cadence (every 4 days vs every 10 months). On price, ads and device support there is nothing between them.

Both are free to download. Casterly sells 2 in-app purchases, starting at $5.99 per month. NBKI Authenticator asks for nothing beyond the download.

NBKI Authenticator ships an update every 10 months, Casterly every 4 days. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | NBKI Authenticator | Casterly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.3 (3 ratings)](https://appshunter.io/ios/app/nbki-authenticator/id1596749062/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 4 days** |
| Monetization | Free | — |
| Size | 75 MB | 32 MB |
| Requires iOS | **15.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [National Bank of Kuwait](https://appshunter.io/developer/451107237) | [CASTERLY VERIFY LTD](https://appshunter.io/developer/1813771531) |

## What reviewers say

### NBKI Authenticator

[App page](https://appshunter.io/ios/app/nbki-authenticator/id1596749062)

This application enhances your banking security and provides a seamless online experience. It allows you to check account balances, review recent transactions, and activate new cards. The app guides you through a secure activation process involving identity verification and one-time passcodes.

**Highlights:** Online fraud protection, Check account balance, View recent transactions, Activate newly issued cards, Secure online purchase completion, Biometric identity confirmation

**Features:** Apple Wallet

**In-app purchases:** none


### Casterly

[App page](https://appshunter.io/ios/app/casterly/id6752854786)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Casterly Monthly | $5.99 | per month |
| Casterly Annual | $59.99 | per year |


## Frequently asked questions

### Is NBKI Authenticator free?

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

### Is Casterly free?

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

### Do NBKI Authenticator or Casterly have ads?

Neither NBKI Authenticator nor Casterly shows ads.

### Which is updated more often, NBKI Authenticator or Casterly?

NBKI Authenticator ships an update every 10 months, and Casterly every 4 days. Most recently, NBKI Authenticator was updated on October 13, 2026 and Casterly on October 25, 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.*