# Optimal Authenticator vs TaxMate Tracker

The clearest difference is in-app purchases: Optimal Authenticator at none against TaxMate Tracker's 1. Optimal Authenticator also leads on iOS requirement (15.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. TaxMate Tracker sells 1 one-off in-app purchase. Optimal Authenticator asks for nothing beyond the download.

Optimal Authenticator ships an update every 3 months, TaxMate Tracker every 6 months. The most recent releases landed on September 19, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Optimal Authenticator | TaxMate Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (4 ratings)](https://appshunter.io/ios/app/optimal-authenticator/id1217402923/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | Free | — |
| Size | 80 MB | 4 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Optimal IdM](https://appshunter.io/developer/1050742329) | [Adam Gumm](https://appshunter.io/developer/844541406) |

## 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


### TaxMate Tracker

[App page](https://appshunter.io/ios/app/taxmate-tracker/id6747366138)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TaxMate 15 Coins | $0.99 | one-time |


## Frequently asked questions

### Is Optimal Authenticator free?

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

### Is TaxMate Tracker free?

TaxMate Tracker is free to download, with in-app purchases available.

### Do Optimal Authenticator or TaxMate Tracker have ads?

Neither Optimal Authenticator nor TaxMate Tracker shows ads.

### Which is updated more often, Optimal Authenticator or TaxMate Tracker?

Optimal Authenticator ships an update every 3 months, and TaxMate Tracker every 6 months. Most recently, Optimal Authenticator was updated on September 19, 2026 and TaxMate Tracker on September 10, 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.*