Zero vs Smart Time 5 Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Zero
This email client is designed for legal professionals to streamline their workflow and increase billable hours. It offers features like predictive filing, inbox sorting, recipient verification, and automatic time tracking for client communications, all while adhering to strict security standards.
- Predictive message filing
- Inbox sorting by importance/sender
- Wrong recipient warnings
- Automatic time tracking
- On-device AI processing
- Strict security standards
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ZERØ’s email client has been engineered to help lawyers work less and bill more. With ZERØ, lawyers can: · Predictively file messages to their document management system or to their corresponding email folders. · Sort their inboxes by parameters such as importance and sender. · Receive a warning in real-time if they are about to send a message to a potential wrong recipient. · Automatically and contemporaneously capture the time spent interacting with client messages from their mobile devices. And as powerful as ZERØ is, the application takes into account the strictest security standards. Our proprietary AI processes data directly on the device—meaning that no user data is ever sent outside of the device for processing. ZERØ also always remains entirely within your law firm’s security perimeter. Using ZERØ, lawyers can be more productive and generate more revenue.
Smart Time 5 Pro
This app offers advanced mobile timekeeping features, including time entry, capture, and billing guidelines. It provides professionals with powerful tools for tracking their work, mirroring the desktop experience for flexibility.
- Time Entry
- Time Capture
- Billing Guidelines
- Approver Modules
- Mobile Timekeeping
- Desktop Experience Integration
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Smart Time 5 Pro is a new, advanced mobile app designed to deliver the same timekeeping features as our desktop version including Time Entry, Time Capture, Billing Guidelines, and Approver modules. Smart Time 5 Pro mobile timekeeping is easier to use than ever before with expanded functionalities that support your active professionals everywhere they work. Combine the power of the desktop experience with the portability of mobile to build an adaptive timekeeping experience for your firm.
Screenshots
Verdict
The clearest difference is rating: Zero at 5.0 against Smart Time 5 Pro's 3.0. Smart Time 5 Pro's advantage is iOS requirement (13.0 vs 17.0). On price, ratings volume, update cadence and ads 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Zero holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 6 respectively.
Zero ships an update monthly, Smart Time 5 Pro fortnightly. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.
| Parameter | Zero | Smart Time 5 Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | 3.0 (6 ratings) |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | 3 | 6 — better |
| Update frequency | Monthly | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 207 MB | 87 MB |
| Age rating | 17+ | 4+ |
| Developer | Aderant Holdings Inc. | BigHand |
Customer experience
Zero
Smart Time 5 Pro
In-app purchases
Zero
No in-app purchases
Smart Time 5 Pro
No in-app purchases
