# Doubling Back vs Two Factor

The clearest difference is iOS requirement: Doubling Back at 12.0 against Two Factor's 17.6. On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Doubling Back | Two Factor |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/doubling-back/id1217167960/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | — |
| Monetization | Free | Free |
| Size | 9 MB | 2 MB |
| Requires iOS | **12.0** | 17.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Terry NIGHTINGALE](https://appshunter.io/developer/1217167959) | [Baulin Roman](https://appshunter.io/developer/475892173) |

## What reviewers say

### Doubling Back

[App page](https://appshunter.io/ios/app/doubling-back/id1217167960)

This utility app allows you to precisely measure walking or running distances. You can start and stop tracking at any point, and it calculates the total distance covered only during the measured segments.

**Highlights:** Measure walking/running distance, Start and stop measurement, Calculate distance for selected portions, iPhone and iPad compatible

**Features:** macOS Compatibility

**In-app purchases:** none


### Two Factor

[App page](https://appshunter.io/ios/app/two-factor-authenticator/id6744589337)

This app generates 2-step verification codes for your accounts, keeping your secrets synchronized and protected across your Apple devices. It prioritizes privacy with offline functionality, no tracking, and no data collection.

**Highlights:** Offline code generation, iCloud synchronization, Face ID/Touch ID access, Multiple password-protected vaults, QR code import, Support for TOTP and HOTP

**In-app purchases:** none


## Frequently asked questions

### Is Doubling Back free?

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

### Is Two Factor free?

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

### Do Doubling Back or Two Factor have ads?

Neither Doubling Back nor Two Factor 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.*