# Bitdefender Mobile Security vs Avast One

The clearest difference is update cadence: Bitdefender Mobile Security at weekly against Avast One's every 3 weeks. Bitdefender Mobile Security also leads on iOS requirement (13.0 vs 17.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Bitdefender Mobile Security sells 8 in-app purchases, starting at $3.99 per month and Avast One sells 19 in-app purchases, starting at $2.49 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 — 4.7 for Bitdefender Mobile Security against 4.7 for Avast One. Both are backed by a comparable volume of ratings — 38K and 100K respectively. Written reviews are what separate them: 46% of Bitdefender Mobile Security's written reviews are positive against 54% of Avast One's.

Bitdefender Mobile Security ships an update weekly, Avast One every 3 weeks. Both last shipped on October 26, 2026.

## The numbers

| Metric | Bitdefender Mobile Security | Avast One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (38K ratings)](https://appshunter.io/ios/app/bitdefender-mobile-security/id1255893012/reviews) | **[4.7 (100K ratings)](https://appshunter.io/ios/app/avast-one-security-and-privacy/id1276551855/reviews)** |
| Number of ratings | 38K | **100K** |
| Positive reviews | 46.2% of reviews | **53.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Monetization | Free with in-app purchases | Freemium |
| Best chart rank | #180 | **#162** |
| Size | 184 MB | 519 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Bitdefender SRL](https://appshunter.io/developer/384899757) | [AVAST Software s.r.o](https://appshunter.io/developer/568017534) |

## What reviewers say

### Bitdefender Mobile Security

[App page](https://appshunter.io/ios/app/bitdefender-mobile-security/id1255893012)

**Currently charting:** #180 Top Grossing · Utilities (US App Store)

Safeguard your iPhone from phishing, malicious websites, and data breaches. This app offers real-time threat monitoring, security scans, and account privacy checks to protect your personal information and online identity.

**Highlights:** Scam Alert for phishing, Web Protection against dangerous sites, Security Scan for vulnerabilities, Account Privacy breach checks, Essential VPN Protection, Real-time threat monitoring

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mobile Security Monthly | $3.99 | per month |
| Monthly Premium VPN | $6.99 | per month |
| Total Security Monthly | $9.99 | per month |
| Mobile Security Yearly | $29.99 | per year |
| Mobile Security Yearly | $29.99 | per year |
| Yearly Premium VPN | $69.99 | per year |
| Total Security Yearly | $109.99 | per year |
| Ultimate Security Individual Yearly | $159.99 | per year |

**What reviewers like**

- 🚀 Great security
- 🔒 Protects against scams and malware
- 👍 Easy to use
- 🚀 Reliable VPN connection
- 🔒 Keeps devices safe

**What reviewers complain about**

- 🐛 Frequent disconnections of VPN and web protection
- 🔋 Drains battery quickly
- 🐛 Interferes with other apps and services
- 🐛 Buggy and unreliable
- 💰 Expensive for limited features

**Reported bugs**

- Web protection randomly turning off
- VPN connection issues and errors
- Compatibility problems with iOS devices
- Subscription and billing problems

**Requested features**

- Automatic web protection and VPN connection
- Better integration with other apps
- More transparent pricing and subscription model
- Improved customer support


### Avast One

[App page](https://appshunter.io/ios/app/avast-one-security-and-privacy/id1276551855)

**Currently charting:** #162 Top Grossing · Utilities (US App Store)

Safeguard your digital life with comprehensive protection against online threats, scams, and identity theft. Secure your Wi-Fi, encrypt your traffic with a VPN, and protect your sensitive data.

**Highlights:** AI-powered scam protection, Call and SMS blocking, Malicious website blocker, VPN for secure browsing, Network intrusion detection, Identity and hack alerts, Encrypted photo vault

**In-app purchases (19)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.49 | per month |
| Monthly | $4.99 | per month |
| Premium | $15.99 | per year |
| Offer | $19.99 | per year |
| Premium tier | $19.99 | per year |
| Yearly subscription | $19.99 | per year |
| Ultimate subscription | $24.99 | per year |
| 1 Year | $28.99 | per year |
| 1 year Ultimate | $29.99 | per year |
| Ultimate subscription | $29.99 | per year |
| Ultimate subscription | $29.99 | per year |
| Yearly subscription | $29.99 | per year |
| Ultimate subscription | $34.99 | per year |
| Yearly subscription | $34.99 | per year |
| Avast Mobile Security Ultimate | $39.99 | per year |
| Avast Mobile Security Ultimate | $39.99 | per year |
| Ultimate subscription | $39.99 | per year |
| Ultimate subscription | $39.99 | per year |
| Yearly Ultimate | $39.99 | per year |

**What reviewers like**

- 🚀 Excellent security protection
- 🔒 Reliable virus and malware detection
- 👍 Easy to use and navigate
- 🔒 Provides a sense of security and peace of mind
- 💡 Useful features like photo vault and VPN

**What reviewers complain about**

- 🐛 Occasional issues with VPN connectivity and functionality
- 🔋 Can be resource-intensive and drain battery life
- 💰 Premium features require paid subscription
- 🤔 Unclear how effective the free version is for virus/malware removal

**Reported bugs**

- VPN repeatedly disconnecting or not working as expected
- App blocking access to certain websites and apps
- Inconsistent performance and stability issues

**Requested features**

- Ability to choose VPN server location
- More comprehensive scanning and virus removal capabilities
- Better integration with other security features


## Frequently asked questions

### Is Bitdefender Mobile Security free?

Bitdefender Mobile Security is free to download, with in-app purchases available.

### Is Avast One free?

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

### Which has better reviews, Bitdefender Mobile Security or Avast One?

Avast One is rated higher. Bitdefender Mobile Security averages 4.7 out of 5 from 38K ratings, while Avast One averages 4.7 from 100K ratings.

### Do Bitdefender Mobile Security or Avast One have ads?

Neither Bitdefender Mobile Security nor Avast One shows ads.

### Which is updated more often, Bitdefender Mobile Security or Avast One?

Bitdefender Mobile Security ships an update weekly, and Avast One every 3 weeks. Most recently, Bitdefender Mobile Security was updated on October 26, 2026 and Avast One on October 26, 2026.

### Which is more popular, Bitdefender Mobile Security or Avast One?

Bitdefender Mobile Security currently peaks at #180 in the App Store charts, and Avast One at #162. Chart position reflects recent download velocity rather than total install base.

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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.*