Comparison

SOS Online Backup vs Mail Assistant

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SOS Online Backup

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
Read full description

SOS Online Backup is a direct-to-cloud backup and recovery solution for mobile devices, laptops, and remote offices. With SOS Online Backup, you can protect data on your devices against accidental deletion, malicious attacks, or device loss. SOS Online Backup for iOS lets you: - Back up data from your device and store it in the cloud. - Access and browse your data backed up from the current device or any other devices you use. - Restore your data backed up from the current device or from any other devices you use.

About

Mail Assistant

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
Read full description

Struggling to understand or respond to important letters? Whether it's a bill, government notice, legal or personal letter, this AI-powered app helps you understand, summarize, and respond professionally. Key Features: Scan or Upload Any Paper Mail Simply take a photo or upload PDF file, and let AI handle the rest! AI-Powered Mail Summarization Instantly get a clear and concise summary of any letter—no more struggling with complex language or long documents. Ask AI Questions About Your Mail Unsure what a letter means? Ask specific questions and get instant, easy-to-understand answers based on the content. Compose Professional Replies Need to respond to an official letter? Let AI draft a polite, well-structured reply for you in seconds. Supports 80+ Languages Translate and understand mail in multiple languages, making it perfect for immigrants, international professionals, and multilingual households. Effortlessly manage your mail, eliminate confusion, and respond with confidence. Get full access to the app features by purchasing a monthly or yearly auto-renewable subscription. You can track and manage your subscriptions in your iTunes account. Terms of use: https://antikapps.tilda.ws/terms People illustrations by Storyset - https://storyset.com/people

Screenshots

SOS Online Backup4 screens
Mail Assistant4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 5 level
SOS Online Backup versus Mail Assistant: the parameters behind the verdict, then further details
ParameterSOS Online BackupMail Assistant
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews22.2% of reviews100.0% of reviews — better
Number of ratings—3 — better
Update frequencyEvery 8 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.3 — better15.0
Further details — not scored
Size10 MB21 MB
Age rating4+4+
DeveloperInfrascale, Inc.Cheese Wheels Apps OU

Customer experience

SOS Online Backup

Written reviews18 reviews
Positive22.2%
Neutral16.7%
Negative61.1%

Mail Assistant

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SOS Online Backup

No in-app purchases

2 purchases

Mail Assistant

Subscriptions2
  • Monthly subscription3 Days trial$9.991 Month
  • Yearly subscription$49.991 Year

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.

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