# Standby Clock vs O3 ONField

The clearest difference is rating: O3 ONField at 5.0 against Standby Clock's 4.4. O3 ONField also leads on in-app purchases (none vs 3) and ads (none vs shown). Standby Clock's advantage is ratings volume (716 vs 1). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Standby Clock sells 3 one-off in-app purchases. O3 ONField asks for nothing beyond the download.

O3 ONField holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Standby Clock has 716 ratings behind it against 1, so its average is the more settled of the two.

Standby Clock ships an update every 6 weeks, O3 ONField fortnightly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Standby Clock | O3 ONField |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (716 ratings)](https://appshunter.io/ios/app/standby-clock-on-lock-screen/id1466459620/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/o3-onfield/id6748837231/reviews)** |
| Number of ratings | **716** | 1 |
| Positive reviews | 61.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 56 MB | 34 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [云云 唐](https://appshunter.io/developer/1443085254) | [O3 Solutions](https://appshunter.io/developer/1449739669) |

## What reviewers say

### Standby Clock

[App page](https://appshunter.io/ios/app/standby-clock-on-lock-screen/id1466459620)

This app transforms your device into a full-screen digital clock with customizable fonts and colors. It offers a musical alarm, displays seconds on the dynamic island and lock screen, and can broadcast the time hourly. Enjoy background alarms with custom ringtones and various widget options.

**Highlights:** Full-screen digital time display, Seconds on dynamic island and lock screen, Customizable digital font styles and colors, Musical alarm with custom ringtones, Hourly chime and voice broadcasting, Lock screen and Home Screen widgets

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| All Clock Styles | $0.99 | one-time |
| Pro Version | $1.99 | one-time |

**What reviewers like**

- 👍 Simple and easy to use
- 🕰️ Customizable clock display
- 💡 Useful night light feature
- 🔍 Clear and accurate time display

**What reviewers complain about**

- 🐛 Vertical time display not preferred
- 🕰️ Lack of additional features (e.g., weather, date)
- 💰 Paid app with limited free features
- 🔋 Short screen time before turning off

**Reported bugs**

- Clock not displaying properly on home screen
- Alarm not working as expected

**Requested features**

- Add horizontal time display option
- Include weather and date information
- Improve screen timeout settings
- Offer more customization options


### O3 ONField

[App page](https://appshunter.io/ios/app/o3-onfield/id6748837231)

Manage capital projects directly from your mobile device. This app supports industry-leading practices like Advanced Work Packaging (AWP), Agile, and Lean to boost team performance from planning to startup. It enables key workflows, such as IWP progressing, even when offline, ensuring productivity in low-connectivity jobsite environments.

**Highlights:** Mobile capital project management, Advanced Work Packaging (AWP) support, Agile and Lean methodologies, Offline IWP progressing, Jobsite productivity tools

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Standby Clock free?

Standby Clock is free to download, with in-app purchases available.

### Is O3 ONField free?

O3 ONField is free to download, with no in-app purchases.

### Which has better reviews, Standby Clock or O3 ONField?

O3 ONField is rated higher. Standby Clock averages 4.4 out of 5 from 716 ratings, while O3 ONField averages 5.0 from 1 ratings.

### Do Standby Clock or O3 ONField have ads?

Standby Clock shows ads; O3 ONField does not.

### Which is updated more often, Standby Clock or O3 ONField?

Standby Clock ships an update every 6 weeks, and O3 ONField fortnightly. Most recently, Standby Clock was updated on November 3, 2026 and O3 ONField on October 30, 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.*