# Authenticator App 2FA OTP Auth vs Cementing Engineer

The clearest difference is monetization model: Authenticator App 2FA OTP Auth at free with in-app purchases against Cementing Engineer's subscription. Cementing Engineer's advantage is ratings volume (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. Authenticator App 2FA OTP Auth sells 3 in-app purchases, starting at $4.99 per 7 days and Cementing Engineer sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Authenticator App 2FA OTP Auth against 5.0 for Cementing Engineer. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

## The numbers

| Metric | Authenticator App 2FA OTP Auth | Cementing Engineer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/authenticator-app-2fa-otp-auth/id6753067161/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/cementing-engineer/id6779455442/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 55 MB | 18 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ewregu](https://appshunter.io/developer/1774451962) | [Rondo Wright](https://appshunter.io/developer/6779455444) |

## What reviewers say

### Authenticator App 2FA OTP Auth

[App page](https://appshunter.io/ios/app/authenticator-app-2fa-otp-auth/id6753067161)

Secure your online accounts with an extra layer of protection. This app generates and stores two-factor authentication codes directly on your device, ensuring your information stays safe from unauthorized access. It offers easy setup, encrypted backups, and offline code generation for continuous security.

**Highlights:** Secure and encrypted token storage, Automatic iCloud sync and backup, Encrypted backup for recovery, Easy account setup via QR codes or manual entry, Custom and service icons for recognition, Offline code generation, Face ID & Touch ID security

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Plan | $4.99 | per 7 days |
| Monthly Plan | $9.99 | per month |
| Yearly Plan | $49.99 | per year |


### Cementing Engineer

[App page](https://appshunter.io/ios/app/cementing-engineer/id6779455442)

This app is a field calculator for oilfield cementing operations. It allows users to input wellbore geometry and slurry details to get live, updated calculations for volumes, pressures, and pump schedules. The app also features a live well schematic and a tally book for saving and recalling job details.

**Highlights:** Field calculator for oilfield cementing, Live, updating calculations for volumes and pressures, Wellbore geometry and slurry stack input, Derived results with detailed math, Live well schematic, Tally Book for saving and recalling jobs, Offline functionality

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $9.99 | per month |
| Pro Annual | $79.99 | per year |


## Frequently asked questions

### Is Authenticator App 2FA OTP Auth free?

Authenticator App 2FA OTP Auth is free to download, with in-app purchases available.

### Is Cementing Engineer free?

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

### Which has better reviews, Authenticator App 2FA OTP Auth or Cementing Engineer?

Authenticator App 2FA OTP Auth and Cementing Engineer are both rated 5.0 out of 5 on the App Store, from 1 and 3 ratings respectively.

### Do Authenticator App 2FA OTP Auth or Cementing Engineer have ads?

Neither Authenticator App 2FA OTP Auth nor Cementing Engineer shows ads.

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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.*