Voltage Mail vs Atrebo TREE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Voltage Mail
Securely read and compose encrypted emails on your mobile device. This app allows you to send and receive secure messages, integrating with your existing email accounts and offering robust security features for organizations.
- Read encrypted emails and attachments
- Compose new secure email messages
- Send and receive secure emails
- Integrates with native email apps
- Supports mobile policy restrictions
- Simple self-registration and authentication
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Anyone who sends and receives an encrypted email from Voltage SecureMail can use this application to read and write the email. A license for Voltage SecureMail Mobile Edition is required to compose and send new secure emails from the app and enforce mobile policy restrictions. Audience: Organizations that use Voltage SecureMail to send and receive secure emails. With Voltage SecureMail mobile app you can: • Read encrypted emails and attachments • Compose a new secure email message • Send and receive secure emails to anyone • Works with your device's native email applications and inboxes • Works with Apple iPhones, iPads, and email clients • Simple self-registration and authentication • Works with desktop, cloud, and web-based email systems • Supports Microsoft Intune
Atrebo TREE
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The TREE mobile application brings many of the core functionalities of the TREE web platform into the hands of field agents. Designed to extend the platform’s capabilities beyond the office, the app empowers on-site personnel to manage site access, oversee critical infrastructure installations, and handle work orders directly in the field.
Screenshots
Verdict
Voltage Mail and Atrebo TREE are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and October 25, 2026 respectively.
| Parameter | Voltage Mail | Atrebo TREE |
|---|---|---|
| Price | Free | Free |
| Rating | 1.7 (736 ratings) — better | — |
| Positive reviews | 8.1% of reviews | — |
| Number of ratings | 736 — better | — |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 24 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | OpenText | Alteda |
Bugs and requests
Voltage Mail
Reported bugs
4 issues- Login screen freezes
- Incompatible with older devices
- Frequent crashes and errors
- Unable to access or download messages
Requested features
4 requests- Add support for more mobile devices and operating systems
- Improve user interface and streamline the message access process
- Allow downloading and printing of attachments
- Better integration with popular email clients
Atrebo TREE
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Voltage Mail
No in-app purchases
Atrebo TREE
No in-app purchases
