# FreeOTP Authenticator vs SOLARMAN Smart

The clearest difference is rating: SOLARMAN Smart at 4.6 against FreeOTP Authenticator's 3.2. SOLARMAN Smart also leads on update cadence (every 2 weeks vs every 6 months) and ratings volume (5.8K vs 172). FreeOTP Authenticator's advantage is iOS requirement (11.0 vs 15.1). 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.

SOLARMAN Smart holds the better App Store score, 4.6 against 3.2. That said, the two scores are not equally well evidenced: SOLARMAN Smart has 5.8K ratings behind it against 172, so its average is the more settled of the two. Written reviews point the same way: 36% of FreeOTP Authenticator's written reviews are positive against 45% of SOLARMAN Smart's.

FreeOTP Authenticator ships an update every 6 months, SOLARMAN Smart every 2 weeks. The most recent releases landed on October 19, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | FreeOTP Authenticator | SOLARMAN Smart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (172 ratings)](https://appshunter.io/ios/app/freeotp-authenticator/id872559395/reviews) | **[4.6 (5.8K ratings)](https://appshunter.io/ios/app/solarman-smart/id1469487897/reviews)** |
| Number of ratings | 172 | **5.8K** |
| Positive reviews | 36.3% of reviews | **44.8% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 11 MB | 93 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Red Hat](https://appshunter.io/developer/533936015) | [IGEN Tech Co., Ltd.](https://appshunter.io/developer/674556352) |

## What reviewers say

### FreeOTP Authenticator

[App page](https://appshunter.io/ios/app/freeotp-authenticator/id872559395)

Generate one-time passwords for enhanced online account security. This app creates temporary codes that, when used with your regular password, significantly strengthen your login protection. It functions even without an internet connection.

**Highlights:** Generates one-time passwords, Works offline (airplane mode), Supports Google, Facebook, GitHub, etc., Compatible with TOTP/HOTP protocols, Open source software

**In-app purchases:** none

**What reviewers like**

- 🚀 Simple and lightweight
- 🔒 Open source and privacy-focused
- 👍 Clean and intuitive interface
- 💡 Customizable icons for accounts

**What reviewers complain about**

- 🐛 Crashes and bugs after recent updates
- 🔒 Lack of backup/restore functionality
- 💡 Limited customization options
- 👎 Unable to edit or delete accounts

**Reported bugs**

- Camera not working for QR code scanning
- App crashing on launch or when unlocking accounts
- UI issues on larger iOS devices

**Requested features**

- Add ability to manually enter account details
- Implement iCloud/cloud backup sync
- Allow renaming and deleting of accounts
- Provide Apple Watch support


### SOLARMAN Smart

[App page](https://appshunter.io/ios/app/solarman-smart/id1469487897)

This app provides intelligent energy management for global users with a focus on visual data display and comprehensive monitoring. It allows for quick plant setup, 24-hour remote monitoring of PV power plants, and efficient collaboration with business partners for operations and maintenance.

**Highlights:** Visual energy data display, 24-hour remote monitoring, Quick plant setup, Authorization for collaboration, Real-time and historical data, Energy consumption tracking

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

**In-app purchases:** none

**What reviewers like**

- 👍 Easy to use
- 🚀 Reliable app
- 💡 Helpful for monitoring solar system
- 🔒 Secure app

**What reviewers complain about**

- 🐛 Inaccurate data and metrics
- ⏱️ Slow updates and real-time issues
- 🔌 Lack of integration with smart home devices
- 🤔 Confusing UI and navigation

**Reported bugs**

- Registration process issues
- Frequent crashes and login problems
- Inconsistent data display and sync issues

**Requested features**

- Add ability to control battery and inverter settings
- Improve historical data and export functionality
- Implement push notifications for grid failures and returns
- Provide more detailed consumption and production data


## Frequently asked questions

### Is FreeOTP Authenticator free?

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

### Is SOLARMAN Smart free?

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

### Which has better reviews, FreeOTP Authenticator or SOLARMAN Smart?

SOLARMAN Smart is rated higher. FreeOTP Authenticator averages 3.2 out of 5 from 172 ratings, while SOLARMAN Smart averages 4.6 from 5.8K ratings.

### Do FreeOTP Authenticator or SOLARMAN Smart have ads?

Neither FreeOTP Authenticator nor SOLARMAN Smart shows ads.

### Which is updated more often, FreeOTP Authenticator or SOLARMAN Smart?

FreeOTP Authenticator ships an update every 6 months, and SOLARMAN Smart every 2 weeks. Most recently, FreeOTP Authenticator was updated on October 19, 2026 and SOLARMAN Smart on October 22, 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.*