# SEMCOG vs Duo Authenticator

The clearest difference is rating: SEMCOG at 5.0 against Duo Authenticator's 4.2. SEMCOG also leads on in-app purchases (none vs 3) and ads (none vs shown). Duo Authenticator's advantage is update cadence (monthly vs every 48 months) and ratings volume (24 vs 2). On price and iOS requirement there is nothing between them.

Both are free to download. Duo Authenticator sells 3 in-app purchases, starting at $3.99 per 7 days. SEMCOG asks for nothing beyond the download.

SEMCOG holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Duo Authenticator has 24 ratings behind it against 2, so its average is the more settled of the two.

SEMCOG ships an update every 48 months, Duo Authenticator monthly. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | SEMCOG | Duo Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/semcog/id1423253986/reviews)** | [4.2 (24 ratings)](https://appshunter.io/ios/app/duo-authenticator/id1665454984/reviews) |
| Number of ratings | 2 | **24** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 48 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 9 MB | 61 MB |
| Requires iOS | **15.5** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Southeast Michigan Council of Governments](https://appshunter.io/developer/1360885360) | [Petr Polasek](https://appshunter.io/developer/1613323784) |

## What reviewers say

### SEMCOG

[App page](https://appshunter.io/ios/app/semcog/id1423253986)

Access meeting agendas, materials, and locations quickly. Discover upcoming events and learn about committee members. Find staff contact information and essential details from the organization's website.

**Highlights:** Meeting agendas and materials, Event information, Committee member details, Staff contact directory, Website content access

**Features:** macOS Compatibility

**In-app purchases:** none


### Duo Authenticator

[App page](https://appshunter.io/ios/app/duo-authenticator/id1665454984)

Enhance your online security with this multi-factor authentication app. It provides an extra layer of protection for your accounts by generating time-sensitive codes, even when offline. Secure your sensitive information with ease and peace of mind.

**Highlights:** Quick and easy setup, Wide service compatibility, Time-sensitive security codes, Offline code generation, End-to-end encryption, Security code protection

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium 1 Week | $3.99 | per 7 days |
| Premium 1 Month | $9.99 | per month |
| Premium 1 Year | $29.99 | per year |


## Frequently asked questions

### Is SEMCOG free?

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

### Is Duo Authenticator free?

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

### Which has better reviews, SEMCOG or Duo Authenticator?

SEMCOG is rated higher. SEMCOG averages 5.0 out of 5 from 2 ratings, while Duo Authenticator averages 4.2 from 24 ratings.

### Do SEMCOG or Duo Authenticator have ads?

Duo Authenticator shows ads; SEMCOG does not.

### Which is updated more often, SEMCOG or Duo Authenticator?

SEMCOG ships an update every 48 months, and Duo Authenticator monthly. Most recently, SEMCOG was updated on November 2, 2026 and Duo Authenticator on November 3, 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.*