# Optimal Authenticator vs Duke Energy

The clearest difference is rating: Duke Energy at 4.8 against Optimal Authenticator's 3.0. Duke Energy also leads on update cadence (fortnightly vs every 3 months) and review sentiment (25% vs 0%). Optimal Authenticator's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Duke Energy holds the better App Store score, 4.8 against 3.0. That said, the two scores are not equally well evidenced: Duke Energy has 182K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 0% of Optimal Authenticator's written reviews are positive against 25% of Duke Energy's.

Optimal Authenticator ships an update every 3 months, Duke Energy fortnightly. The most recent releases landed on October 6, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Optimal Authenticator | Duke Energy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (4 ratings)](https://appshunter.io/ios/app/optimal-authenticator/id1217402923/reviews) | **[4.8 (182K ratings)](https://appshunter.io/ios/app/duke-energy/id1325217974/reviews)** |
| Number of ratings | 4 | **182K** |
| Positive reviews | 0.0% of reviews | **25.1% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Free | Free |
| Best chart rank | — | **#175** |
| Size | 80 MB | 93 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Optimal IdM](https://appshunter.io/developer/1050742329) | [Duke Energy Corporation](https://appshunter.io/developer/1299896621) |

## What reviewers say

### Optimal Authenticator

[App page](https://appshunter.io/ios/app/optimal-authenticator/id1217402923)

This app provides a secure way to verify your identity for accessing other applications. It uses two-factor authentication via push notifications or verification codes, and allows organizations to register trusted devices for sign-in requests.

**Highlights:** Two-factor authentication, Push notification verification, On-app verification codes, Trusted device registration, Secure identity verification

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

**In-app purchases:** none


### Duke Energy

[App page](https://appshunter.io/ios/app/duke-energy/id1325217974)

**Currently charting:** #175 Top Free · Utilities (US App Store)

Manage your energy accounts conveniently from your mobile device. View and pay bills, report outages, track energy usage, and access customer support. Save money with energy-saving offers.

**Highlights:** Easy login with Touch ID/Face ID, View and pay bills, Report power outages, Track energy usage, Set up bill reminders, Access energy-saving offers

**In-app purchases:** none

**What reviewers like**

- 🚀 Easy to navigate
- 🔒 Secure payment process
- 👍 Helpful for tracking usage
- 👍 Great company overall

**What reviewers complain about**

- 🐛 Frequent login issues
- 🐛 Unreliable app functionality
- 🐛 Inaccurate billing information
- 🐛 Glitchy payment processing
- 👎 Poor customer service

**Reported bugs**

- Daily usage graphs not working
- Unable to log in consistently
- Payment information not saving properly
- App redirects to website instead of in-app functionality

**Requested features**

- Add last month/last year usage comparison
- Display dollar amount in addition to kWh
- Improve outage map and notifications
- Implement two-factor authentication
- Allow scheduling of bill payments


## Frequently asked questions

### Is Optimal Authenticator free?

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

### Is Duke Energy free?

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

### Which has better reviews, Optimal Authenticator or Duke Energy?

Duke Energy is rated higher. Optimal Authenticator averages 3.0 out of 5 from 4 ratings, while Duke Energy averages 4.8 from 182K ratings.

### Do Optimal Authenticator or Duke Energy have ads?

Neither Optimal Authenticator nor Duke Energy shows ads.

### Which is updated more often, Optimal Authenticator or Duke Energy?

Optimal Authenticator ships an update every 3 months, and Duke Energy fortnightly. Most recently, Optimal Authenticator was updated on October 6, 2026 and Duke Energy on October 21, 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.*