# Authenticator vs RightSize HVAC

The clearest difference is ads: RightSize HVAC at none against Authenticator's shown. RightSize HVAC also leads on update cadence (every 2 weeks vs every 5 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Authenticator sells 17 in-app purchases, starting at $0.99 per 7 days and RightSize HVAC sells 1 in-app purchase, starting at $50.00 per month. Whichever you choose, the download price is not the number that matters.

Authenticator ships an update every 5 months, RightSize HVAC every 2 weeks. The most recent releases landed on October 13, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Authenticator | RightSize HVAC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (135 ratings)](https://appshunter.io/ios/app/authenticator-mobile-2fa-mfa/id6450538201/reviews)** | — |
| Number of ratings | **135** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 127 MB | 12 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ZipoApps](https://appshunter.io/developer/1671444635) | [Ethan Hunt](https://appshunter.io/developer/1891419768) |

## What reviewers say

### Authenticator

[App page](https://appshunter.io/ios/app/authenticator-mobile-2fa-mfa/id6450538201)

Enhance your online security with this app that generates time-based one-time passwords for two-factor authentication. It securely stores all your accounts in one place and works offline, offering peace of mind against cyber threats.

**Highlights:** Generates secure TOTP codes, Stores all accounts in one app, Works offline, Secure cloud backup and sync, Biometric and PIN protection, Auto-fill and copy to clipboard

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

**In-app purchases (17)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited access | $0.99 | per 7 days |
| Unlimited access | $1.99 | per 7 days |
| Unlimited access | $2.99 | per 7 days |
| Unlimited access | $3.99 | per 7 days |
| Unlimited access | $4.99 | per 7 days |
| 2FA Authenticator App: Secure | $5.99 | per 7 days |
| 2FA Authenticator App: Secure | $5.99 | per 7 days |
| Unlimited access | $5.99 | per 7 days |
| Unlimited access | $6.99 | per 7 days |
| Unlimited access | $7.99 | per 7 days |
| Unlimited access | $8.99 | per 7 days |
| Unlimited access | $9.99 | per year |
| Authenticate ID: Authorization | $19.99 | per month |
| Unlimited access | $19.99 | per month |
| Unlimited access | $29.99 | per month |
| Unlimited access | $39.99 | per year |
| Unlimited access | $49.99 | per year |


### RightSize HVAC

[App page](https://appshunter.io/ios/app/rightsize-hvac/id6761776259)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RightSize HVAC | $50.00 | per month |


## Frequently asked questions

### Is Authenticator free?

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

### Is RightSize HVAC free?

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

### Do Authenticator or RightSize HVAC have ads?

Authenticator shows ads; RightSize HVAC does not.

### Which is updated more often, Authenticator or RightSize HVAC?

Authenticator ships an update every 5 months, and RightSize HVAC every 2 weeks. Most recently, Authenticator was updated on October 13, 2026 and RightSize HVAC on October 3, 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.*