# Voltup vs Sign In Authenticator

The clearest difference is in-app purchases: Voltup at none against Sign In Authenticator's 2. Voltup also leads on iOS requirement (15.1 vs 18.0). Sign In Authenticator's advantage is update cadence (weekly vs every 3 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Sign In Authenticator sells 2 in-app purchases, starting at $6.99 per 7 days. Voltup asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Voltup against 5.0 for Sign In Authenticator. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Voltup ships an update every 3 months, Sign In Authenticator weekly. The most recent releases landed on November 8, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Voltup | Sign In Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/voltup/id6752410596/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/sign-in-authenticator/id6813260315/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | Free | — |
| Size | 75 MB | 27 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yellow Haze Pvt. Ltd.](https://appshunter.io/developer/1645993000) | [GetProAct Inc.](https://appshunter.io/developer/6808792201) |

## What reviewers say

### Voltup

[App page](https://appshunter.io/ios/app/voltup/id6752410596)

This platform simplifies electric vehicle charging by allowing owners to find, charge, and pay for electricity at various locations. It caters to individual EV owners, fleet operators, and taxi services, offering convenient payment options.

**Highlights:** Find EV charging stations, Charge electric vehicles, Make online payments, Supports home charging, Supports public charging, Fleet and taxi owner friendly

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Sign In Authenticator

[App page](https://appshunter.io/ios/app/sign-in-authenticator/id6813260315)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Sign In Pro Weekly | $6.99 | per 7 days |
| Sign In Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is Voltup free?

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

### Is Sign In Authenticator free?

Sign In Authenticator is free to download, with in-app purchases available.

### Which has better reviews, Voltup or Sign In Authenticator?

Voltup and Sign In Authenticator are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Voltup or Sign In Authenticator have ads?

Neither Voltup nor Sign In Authenticator shows ads.

### Which is updated more often, Voltup or Sign In Authenticator?

Voltup ships an update every 3 months, and Sign In Authenticator weekly. Most recently, Voltup was updated on November 8, 2026 and Sign In Authenticator on November 13, 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.*