# Flex Calculators vs Authenticator 2FA TOTP OTP MFA

The clearest difference is update cadence: Authenticator 2FA TOTP OTP MFA at every 4 days against Flex Calculators's every 10 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Flex Calculators sells 1 one-off in-app purchase and Authenticator 2FA TOTP OTP MFA sells 2 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Flex Calculators ships an update every 10 days, Authenticator 2FA TOTP OTP MFA every 4 days. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Flex Calculators | Authenticator 2FA TOTP OTP MFA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/authenticator-2fa-totp-otp-mfa/id6785217425/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 4 days** |
| Monetization | — | Freemium |
| Size | 37 MB | 61 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [An Le](https://appshunter.io/developer/1863975090) | [LYKOV STUDIO LTD](https://appshunter.io/developer/1783754094) |

## What reviewers say

### Flex Calculators

[App page](https://appshunter.io/ios/app/flex-calculators/id6761326502)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### Authenticator 2FA TOTP OTP MFA

[App page](https://appshunter.io/ios/app/authenticator-2fa-totp-otp-mfa/id6785217425)

Securely store and manage your two-factor authentication codes in one private location. Easily scan QR codes or enter keys to generate time-based one-time passwords for your accounts. Offers advanced features like encrypted backup and organization tools for a streamlined security experience.

**Highlights:** Time-based code generation, QR code scanning for setup, Manual key entry, Quick code copying, Local authentication for app access, Encrypted backup (premium), Account organization (premium)

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $5.99 | per 7 days |
| Annual | $29.99 | per year |


## Frequently asked questions

### Is Flex Calculators free?

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

### Is Authenticator 2FA TOTP OTP MFA free?

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

### Do Flex Calculators or Authenticator 2FA TOTP OTP MFA have ads?

Neither Flex Calculators nor Authenticator 2FA TOTP OTP MFA shows ads.

### Which is updated more often, Flex Calculators or Authenticator 2FA TOTP OTP MFA?

Flex Calculators ships an update every 10 days, and Authenticator 2FA TOTP OTP MFA every 4 days. Most recently, Flex Calculators was updated on October 16, 2026 and Authenticator 2FA TOTP OTP MFA on October 5, 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.*