# Ultradian vs one sec | screen time + focus

The clearest difference is rating: one sec | screen time + focus at 4.8 against Ultradian's 3.3. one sec | screen time + focus also leads on update cadence (fortnightly vs every 5 months) and ratings volume (24K vs 4). Ultradian's advantage is in-app purchases (none vs 6) and review sentiment (100% vs 76%). On price and ads there is nothing between them.

Both are free to download. one sec | screen time + focus sells 6 in-app purchases, starting at $6.99 per month. Ultradian asks for nothing beyond the download.

one sec | screen time + focus holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: one sec | screen time + focus has 24K ratings behind it against 4, so its average is the more settled of the two. Written reviews complicate that: 100% of Ultradian's written reviews are positive against 76% of one sec | screen time + focus's, so the app with the better star average is not the one people write more warmly about.

Ultradian ships an update every 5 months, one sec | screen time + focus fortnightly. The most recent releases landed on October 29, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Ultradian | one sec | screen time + focus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (4 ratings)](https://appshunter.io/ios/app/ultradian/id1482130799/reviews) | **[4.8 (24K ratings)](https://appshunter.io/ios/app/one-sec-screen-time-plus-focus/id1532875441/reviews)** |
| Number of ratings | 4 | **24K** |
| Positive reviews | **100.0% of reviews** | 75.8% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 413 MB |
| Requires iOS | 17.5 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Katherine Gratale](https://appshunter.io/developer/1482130798) | [riedel.wtf apps S.L.](https://appshunter.io/developer/517545753) |

## What reviewers say

### Ultradian

[App page](https://appshunter.io/ios/app/ultradian/id1482130799)

Leverage your natural energy cycles for optimal task management and rest. This app analyzes biometric data to predict your ultradian rhythms, helping you schedule demanding activities during peak energy and breaks when needed.

**Highlights:** Analyze biometric data, Predict ultradian rhythms, Schedule peak task times, Schedule rest breaks, Connects to Apple Health

**Features:** macOS Compatibility

**In-app purchases:** none


### one sec | screen time + focus

[App page](https://appshunter.io/ios/app/one-sec-screen-time-plus-focus/id1532875441)

This app introduces a brief pause before opening distracting applications, encouraging mindful choices about attention. It scientifically helps reduce screen time by an average of 57% by adding friction to habitual app usage.

**Highlights:** Delayed app access instead of blocking, Reduces screen time by 57% on average, Doom Scroll Emergency Brake (Re-Intervention), Works with any app, including social media and games, Safari extension for website interruptions, Integrates with Structured and LENGO, Mindful moments via HealthKit

**Features:** Safari Extension, Family Sharing, iPhone Duo support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| one sec pro (1 Month) | $6.99 | per month |
| one sec pro \| Family Plan (1 Month) | $9.99 | per month |
| one sec pro (1 Year) | $19.99 | per year |
| one sec pro \| Family Plan (1 Year) | $29.99 | per year |
| one sec pro \| Lifetime | $99.99 | one-time |
| one sec pro \| Family Lifetime | $149.00 | one-time |

**What reviewers like**

- 🚀 Saves time
- 👍 Helps reduce screen time
- 💡 Customizable interventions
- 👍 Effective at curbing habits
- 👍 Intuitive and easy to use

**What reviewers complain about**

- 🐛 Buggy at times
- 💰 Premium features behind paywall
- 🔒 Concerns about privacy/data collection
- 🔒 Inability to fully disable the app
- 🐛 Inconsistent behavior across apps

**Reported bugs**

- App switching issues
- Interventions not triggering properly
- Inconsistent behavior with shortcuts
- Crashes and freezes on certain devices

**Requested features**

- Ability to block more apps for free
- Customizable intervention timers
- Scheduled app blocking/access
- Passcode protection for settings
- Sync settings across devices


## Frequently asked questions

### Is Ultradian free?

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

### Is one sec | screen time + focus free?

one sec | screen time + focus is free to download, with in-app purchases available.

### Which has better reviews, Ultradian or one sec | screen time + focus?

one sec | screen time + focus is rated higher. Ultradian averages 3.3 out of 5 from 4 ratings, while one sec | screen time + focus averages 4.8 from 24K ratings.

### Do Ultradian or one sec | screen time + focus have ads?

Neither Ultradian nor one sec | screen time + focus shows ads.

### Which is updated more often, Ultradian or one sec | screen time + focus?

Ultradian ships an update every 5 months, and one sec | screen time + focus fortnightly. Most recently, Ultradian was updated on October 29, 2026 and one sec | screen time + focus on November 4, 2026.

---

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