# TA Preview vs NBG Authenticator

The clearest difference is update cadence: NBG Authenticator at every 2 weeks against TA Preview's every 5 months. 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.

TA Preview ships an update every 5 months, NBG Authenticator every 2 weeks. The most recent releases landed on September 23, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | TA Preview | NBG Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.2 (12 ratings)](https://appshunter.io/ios/app/nbg-authenticator/id1532016029/reviews)** |
| Number of ratings | — | **12** |
| Positive reviews | — | 1.4% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 16 MB | 38 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [ION](https://appshunter.io/developer/1086591778) | [National Bank of Greece S.A.](https://appshunter.io/developer/342152892) |

## What reviewers say

### TA Preview

[App page](https://appshunter.io/ios/app/ta-preview/id1407183989)

**Features:** macOS Compatibility

**In-app purchases:** none


### NBG Authenticator

[App page](https://appshunter.io/ios/app/nbg-authenticator/id1532016029)

Securely approve your online purchases with your cards. This app provides enhanced payment authentication, aligning with the latest EU security regulations for a safer online shopping experience.

**Highlights:** Approve online purchases, Enhanced payment authentication, PIN and fingerprint sign-in, Register NBG cards, Push notifications for approval

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TA Preview free?

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

### Is NBG Authenticator free?

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

### Do TA Preview or NBG Authenticator have ads?

Neither TA Preview nor NBG Authenticator shows ads.

### Which is updated more often, TA Preview or NBG Authenticator?

TA Preview ships an update every 5 months, and NBG Authenticator every 2 weeks. Most recently, TA Preview was updated on September 23, 2026 and NBG Authenticator on June 11, 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.*