# Authenticator vs Ruler

The clearest difference is ads: Ruler at none against Authenticator's shown. Authenticator's advantage is rating (4.5 vs 4.3) and iOS requirement (14.0 vs 16.0). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. Authenticator sells 3 in-app purchases, starting at $4.99 per 7 days and Ruler sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Authenticator holds the better App Store score, 4.5 against 4.3. Both are backed by a comparable volume of ratings — 25 and 36 respectively.

Authenticator ships an update weekly, Ruler every 6 days. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Authenticator | Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (25 ratings)](https://appshunter.io/ios/app/authenticator-secure-2fa-auth/id6749149708/reviews)** | [4.3 (36 ratings)](https://appshunter.io/ios/app/ruler-measuring-tape/id6752295073/reviews) |
| Number of ratings | 25 | **36** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 6 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 73 MB | 108 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Timon Scherzinger](https://appshunter.io/developer/1895022963) | [URVO PIIRISILD](https://appshunter.io/developer/1840348316) |

## What reviewers say

### Authenticator

[App page](https://appshunter.io/ios/app/authenticator-secure-2fa-auth/id6749149708)

Securely manage your two-factor authentication tokens and passwords in one place. This app offers offline code generation and a private in-app browser. Free users can manage existing codes and passwords, while premium subscribers gain unlimited creation and secure browsing.

**Highlights:** Organize 2FA tokens and passwords, Offline code generation, Built-in secure browser, Manage existing codes and passwords (free), Unlimited code/password creation (premium), Face ID access

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly | $17.99 | per month |
| Yearly | $49.99 | per year |


### Ruler

[App page](https://appshunter.io/ios/app/ruler-measuring-tape/id6752295073)

Transform your phone into a precise measuring tool for any task. Accurately measure small objects on your screen or larger items using augmented reality. Save your measurements and switch between units effortlessly.

**Highlights:** Dual measurement modes (screen/AR), Supports inches, centimeters, millimeters, Fast and accurate results, Measurement history saving, Intuitive user interface

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ruler – Measure Tool | $4.99 | per 7 days |
| Ruler – Measure Tool | $19.99 | per year |


## Frequently asked questions

### Is Authenticator free?

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

### Is Ruler free?

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

### Which has better reviews, Authenticator or Ruler?

Authenticator is rated higher. Authenticator averages 4.5 out of 5 from 25 ratings, while Ruler averages 4.3 from 36 ratings.

### Do Authenticator or Ruler have ads?

Authenticator shows ads; Ruler does not.

### Which is updated more often, Authenticator or Ruler?

Authenticator ships an update weekly, and Ruler every 6 days. Most recently, Authenticator was updated on October 8, 2026 and Ruler on September 30, 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.*