# OTP Auth vs VoltCalc Electrical App

The clearest difference is device support: OTP Auth at 4 against VoltCalc Electrical App's 2. On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. OTP Auth sells 1 one-off in-app purchase and VoltCalc Electrical App sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | OTP Auth | VoltCalc Electrical App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.4 (19 ratings)](https://appshunter.io/ios/app/otp-auth-authenticator/id1436497541/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 30 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [浩 王](https://appshunter.io/developer/1055265396) | [BMAC Infotech](https://appshunter.io/developer/1091994276) |

## What reviewers say

### OTP Auth

[App page](https://appshunter.io/ios/app/otp-auth-authenticator/id1436497541)

Generate and manage two-factor authentication codes offline. Organize accounts with custom groups, search, and widgets. Securely store keys and choose your preferred protection methods.

**Highlights:** Offline code generation, QR code scanning, Custom account groups, Search functionality, Home Screen and Lock Screen widgets, Apple Watch app, Biometric app lock

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| OTPAuth Premium | $1.99 | one-time |


### VoltCalc Electrical App

[App page](https://appshunter.io/ios/app/voltcalc-electrical-app/id6793829428)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Yearly | $5.99 | per year |


## Frequently asked questions

### Is OTP Auth free?

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

### Is VoltCalc Electrical App free?

VoltCalc Electrical App is free to download, with in-app purchases available.

### Do OTP Auth or VoltCalc Electrical App have ads?

Neither OTP Auth nor VoltCalc Electrical App shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*