# Authenticator for Uphold vs NostrKey Web Extension

The clearest difference is in-app purchases: NostrKey Web Extension at none against Authenticator for Uphold's 5. Authenticator for Uphold's advantage is update cadence (every 2 weeks vs monthly) and iOS requirement (13.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Authenticator for Uphold sells 5 in-app purchases, starting at $4.99 per 7 days. NostrKey Web Extension asks for nothing beyond the download.

Authenticator for Uphold ships an update every 2 weeks, NostrKey Web Extension monthly. The most recent releases landed on October 24, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Authenticator for Uphold | NostrKey Web Extension |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.8 (6 ratings)](https://appshunter.io/ios/app/authenticator-for-uphold/id6752381243/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Monthly |
| Size | 70 MB | 15 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [SBE Ide Ct LLC](https://appshunter.io/developer/1839175432) | [Humanjava Enterprises](https://appshunter.io/developer/922926155) |

## What reviewers say

### Authenticator for Uphold

[App page](https://appshunter.io/ios/app/authenticator-for-uphold/id6752381243)

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly-Trial | $4.99 | per 7 days |
| Weekly | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $39.99 | per year |
| Lifetime | $59.99 | one-time |


### NostrKey Web Extension

[App page](https://appshunter.io/ios/app/nostrkey-web-extension/id6759624317)

**Features:** Safari Extension, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Authenticator for Uphold free?

Authenticator for Uphold is free to download, with in-app purchases available.

### Is NostrKey Web Extension free?

NostrKey Web Extension is free to download, with no in-app purchases.

### Do Authenticator for Uphold or NostrKey Web Extension have ads?

Neither Authenticator for Uphold nor NostrKey Web Extension shows ads.

### Which is updated more often, Authenticator for Uphold or NostrKey Web Extension?

Authenticator for Uphold ships an update every 2 weeks, and NostrKey Web Extension monthly. Most recently, Authenticator for Uphold was updated on October 24, 2026 and NostrKey Web Extension on October 14, 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.*