# NUSO vs KaseyaOne Authenticator

The clearest difference is rating: KaseyaOne Authenticator at 3.0 against NUSO's 2.7. On price, review sentiment, ratings volume and update cadence there is nothing between them.

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

KaseyaOne Authenticator holds the better App Store score, 3.0 against 2.7. Both are backed by a comparable volume of ratings — 13 and 7 respectively. Written reviews complicate that: 25% of NUSO's written reviews are positive against 20% of KaseyaOne Authenticator's, so the app with the better star average is not the one people write more warmly about.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 8, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | NUSO | KaseyaOne Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (13 ratings)](https://appshunter.io/ios/app/nuso/id1609666809/reviews) | **[3.0 (7 ratings)](https://appshunter.io/ios/app/kaseyaone-authenticator/id6466401361/reviews)** |
| Number of ratings | **13** | 7 |
| Positive reviews | **25.0% of reviews** | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free | Free |
| Size | 123 MB | 5 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Brightlink Communications LLC](https://appshunter.io/developer/1447894835) | [Kaseya International](https://appshunter.io/developer/354566867) |

## What reviewers say

### NUSO

[App page](https://appshunter.io/ios/app/nuso/id1609666809)

This business communication app offers a cloud-based phone system with contact center features. It allows users to make and receive office calls on their mobile devices, use their business number for outgoing calls, and manage answering rules remotely. Access your office contact list with real-time presence and enjoy features like visual voicemail and call history.

**Highlights:** Mobile office calls, Business number caller ID, Remote answering rules, In-office contact list, Visual voicemail, Call history, Custom greetings

**Features:** macOS Compatibility, Siri integration

**In-app purchases:** none


### KaseyaOne Authenticator

[App page](https://appshunter.io/ios/app/kaseyaone-authenticator/id6466401361)

Streamline your multi-factor authentication with instant push notifications. Securely approve logins with biometrics and a simple tap, saving significant time daily.

**Highlights:** Push-MFA notifications, Biometric unlock, One-tap approval, Fast login process, Secure verification

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NUSO free?

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

### Is KaseyaOne Authenticator free?

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

### Which has better reviews, NUSO or KaseyaOne Authenticator?

KaseyaOne Authenticator is rated higher. NUSO averages 2.7 out of 5 from 13 ratings, while KaseyaOne Authenticator averages 3.0 from 7 ratings.

### Do NUSO or KaseyaOne Authenticator have ads?

Neither NUSO nor KaseyaOne Authenticator shows ads.

### Which is updated more often, NUSO or KaseyaOne Authenticator?

NUSO ships an update every 2 months, and KaseyaOne Authenticator every 2 months. Most recently, NUSO was updated on September 8, 2026 and KaseyaOne Authenticator on June 1, 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.*