Comparison

Inbox Pro vs SynergyOS

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

Head to head
About

Inbox Pro

This email client prioritizes your privacy and security for Gmail accounts. It offers robust protection through data-free access, biometric locks, and encrypted communication, ensuring your sensitive information remains safe.

Highlights
  • Data-free email access
  • Fingerprint/Face ID lock
  • Encrypted communication
  • Passcode protection
  • Seamless Gmail integration
  • User-friendly interface
Features
Read full description

Secure Mail is the ultimate email client for iOS, designed to provide you with the highest level of privacy and security when accessing your Gmail account. Say goodbye to worries about your sensitive email data falling into the wrong hands in case of a lost or stolen phone. Key Features: Data-Free Security: Unlike conventional email clients, Secure Mail doesn't store your emails or attachments on your device. All your data is accessed directly from Gmail's secure servers. This means that even if your phone is lost or stolen, your emails remain inaccessible to unauthorized users. Fingerprint/Face ID Lock: We understand the importance of an extra layer of security. Secure Mail allows you to set up biometric authentication (Face ID or Fingerprint) to ensure that only you can access your email client. Encrypted Communication: Secure Mail uses advanced encryption protocols to secure the communication between your device and Gmail's servers. This ensures that your email data is protected at all times. Passcode Protection: In addition to biometric authentication, you can set a unique passcode to further enhance the security of your email client. Gmail Integration: Secure Mail seamlessly integrates with your Gmail account, giving you access to all your emails, attachments, labels, and folders, just as you would expect from a Gmail client. User-Friendly Interface: With an intuitive and user-friendly design, Secure Mail ensures that you can easily manage your emails, compose new messages, and stay organized with your Gmail account.

About

SynergyOS

Enhance team productivity and collaboration with a unified platform for communication and file management. This secure app enables instant chats and efficient organization, allowing teams to work together seamlessly from any location.

Highlights
  • Instant team chats
  • Secure file management
  • Unified platform
  • Remote work support
  • Efficient organization
Features
Read full description

Improve productivity and collaboration with SynergyOS Mobile. Collaborate instantly with Chats, and manage your files with Drive — all in one secure, unified platform. SynergyOS empowers your team to communicate, organize, and work efficiently from anywhere. Note: SynergyOS is available exclusively for business and enterprise customers.

Screenshots

Inbox Pro4 screens
SynergyOS4 screens

Verdict

The call

The clearest difference is rating: SynergyOS at 5.0 against Inbox Pro's 4.5. SynergyOS also leads on update cadence (every 5 days vs every 2 months). Inbox Pro's advantage is ratings volume (147 vs 1). On price, ads, in-app purchases and monetization model 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SynergyOS holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Inbox Pro has 147 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Inbox Pro ships an update every 2 months, SynergyOS every 5 days. The most recent releases landed on November 7, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 7 level
Inbox Pro versus SynergyOS: the parameters behind the verdict, then further details
ParameterInbox ProSynergyOS
PriceFreeFree
Rating4.5 (147 ratings)5.0 (1 ratings) — better
Positive reviews0.0% of reviews—
Number of ratings147 — better1
Update frequencyEvery 2 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone, iPod — better
Requires iOS16.015.1 — better
Further details — not scored
Size70 MB28 MB
Age rating4+4+
DeveloperChromaticApp LtdSynergy Inc.

Customer experience

Inbox Pro

All ratings40 ratings
Positive82.5%
Neutral7.5%
Negative10.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

SynergyOS

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Inbox Pro

No in-app purchases

None

SynergyOS

No in-app purchases

Questions

Is Inbox Pro free?
Inbox Pro is free to download, with no in-app purchases.
Is SynergyOS free?
SynergyOS is free to download, with no in-app purchases.
Which has better reviews, Inbox Pro or SynergyOS?
SynergyOS is rated higher. Inbox Pro averages 4.5 out of 5 from 147 ratings, while SynergyOS averages 5.0 from 1 ratings.
Do Inbox Pro or SynergyOS have ads?
Neither Inbox Pro nor SynergyOS shows ads.
Which is updated more often, Inbox Pro or SynergyOS?
Inbox Pro ships an update every 2 months, and SynergyOS every 5 days. Most recently, Inbox Pro was updated on November 7, 2026 and SynergyOS on November 4, 2026.

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