# Zero vs Smart Time 5 Pro

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.

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.

## The numbers

| Metric | Zero | Smart Time 5 Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/zero-email-for-attorneys/id1216474378/reviews)** | [3.0 (6 ratings)](https://appshunter.io/ios/app/smart-time-5-pro/id1479606633/reviews) |
| Number of ratings | 3 | **6** |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free | Free |
| Size | 207 MB | 87 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Aderant Holdings Inc.](https://appshunter.io/developer/896510525) | [BigHand](https://appshunter.io/developer/363744436) |

## What reviewers say

### Zero

[App page](https://appshunter.io/ios/app/zero-email-for-attorneys/id1216474378)

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.

**Highlights:** Predictive message filing, Inbox sorting by importance/sender, Wrong recipient warnings, Automatic time tracking, On-device AI processing, Strict security standards

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Time 5 Pro

[App page](https://appshunter.io/ios/app/smart-time-5-pro/id1479606633)

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.

**Highlights:** Time Entry, Time Capture, Billing Guidelines, Approver Modules, Mobile Timekeeping, Desktop Experience Integration

**In-app purchases:** none


## Frequently asked questions

### Is Zero free?

Zero is free to download, with no in-app purchases.

### Is Smart Time 5 Pro free?

Smart Time 5 Pro is free to download, with no in-app purchases.

### Which has better reviews, Zero or Smart Time 5 Pro?

Zero is rated higher. Zero averages 5.0 out of 5 from 3 ratings, while Smart Time 5 Pro averages 3.0 from 6 ratings.

### Do Zero or Smart Time 5 Pro have ads?

Neither Zero nor Smart Time 5 Pro shows ads.

### Which is updated more often, Zero or Smart Time 5 Pro?

Zero ships an update monthly, and Smart Time 5 Pro fortnightly. Most recently, Zero was updated on October 24, 2026 and Smart Time 5 Pro on October 20, 2026.

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