# SOS Online Backup vs Mail Assistant

The clearest difference is review sentiment: Mail Assistant at 100% against SOS Online Backup's 22%. Mail Assistant also leads on update cadence (every 10 days vs every 8 months). SOS Online Backup's advantage is in-app purchases (none vs 2) and iOS requirement (12.3 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Mail Assistant sells 2 in-app purchases, starting at $9.99 per month. SOS Online Backup asks for nothing beyond the download.

SOS Online Backup ships an update every 8 months, Mail Assistant every 10 days. The most recent releases landed on October 6, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | SOS Online Backup | Mail Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/mail-assistant-scanaskreply/id6741898310/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | 22.2% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 10 days** |
| Monetization | **Free** | Subscription |
| Size | 10 MB | 21 MB |
| Requires iOS | **12.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Infrascale, Inc.](https://appshunter.io/developer/328057516) | [Cheese Wheels Apps OU](https://appshunter.io/developer/1819473115) |

## What reviewers say

### SOS Online Backup

[App page](https://appshunter.io/ios/app/sos-online-backup/id328057513)

Securely back up and restore data from your mobile devices, laptops, and remote offices to the cloud. Protect your information against accidental deletion, device loss, or cyberattacks. Access and manage your backed-up files from any device.

**Highlights:** Direct-to-cloud backup, Data recovery, Cross-device access, Protection against data loss, Mobile, laptop, and office support

**Features:** macOS Compatibility

**In-app purchases:** none


### Mail Assistant

[App page](https://appshunter.io/ios/app/mail-assistant-scanaskreply/id6741898310)

Understand, summarize, and professionally respond to any letter with AI. Scan or upload documents, ask questions about their content, and get instant translations in over 80 languages. Effortlessly manage your mail and reply with confidence.

**Highlights:** Scan or upload paper mail, AI-powered mail summarization, Ask AI questions about mail content, Compose professional replies, Supports 80+ languages, Translate and understand mail

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly subscription | $9.99 | per month |
| Yearly subscription | $49.99 | per year |


## Frequently asked questions

### Is SOS Online Backup free?

SOS Online Backup is free to download, with no in-app purchases.

### Is Mail Assistant free?

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

### Do SOS Online Backup or Mail Assistant have ads?

Neither SOS Online Backup nor Mail Assistant shows ads.

### Which is updated more often, SOS Online Backup or Mail Assistant?

SOS Online Backup ships an update every 8 months, and Mail Assistant every 10 days. Most recently, SOS Online Backup was updated on October 6, 2026 and Mail Assistant on October 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*