# iSmoothRun vs O2 Renew

The clearest difference is price: O2 Renew at Free against iSmoothRun's $4.99. O2 Renew also leads on in-app purchases (none vs 2) and update cadence (every 4 weeks vs every 2 months). iSmoothRun's advantage is chart position (#80 vs unranked). On ads, device support and iOS requirement there is nothing between them.

O2 Renew is free to download; iSmoothRun costs $4.99 up front. iSmoothRun sells 2 in-app purchases, starting at $4.99 per month. O2 Renew asks for nothing beyond the download.

iSmoothRun ships an update every 2 months, O2 Renew every 4 weeks. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | iSmoothRun | O2 Renew |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.4 (942 ratings)](https://appshunter.io/ios/app/ismoothrun/id410965399/reviews)** | — |
| Number of ratings | **942** | — |
| Positive reviews | 70.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Freemium | — |
| Best chart rank | **#80** | — |
| Size | 31 MB | 122 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Lake Horizon Ltd](https://appshunter.io/developer/410965402) | [Sutra Fitness, Inc.](https://appshunter.io/developer/914371834) |

## What reviewers say

### iSmoothRun

[App page](https://appshunter.io/ios/app/ismoothrun/id410965399)

**Currently charting:** #80 Top Paid · Health & Fitness (US App Store)

This app tracks and logs various fitness activities like running, walking, and cycling with extensive sensor support. It offers advanced training features, workout planning, and seamless integration with popular fitness platforms and HealthKit.

**Highlights:** Activity tracking (running, walking, cycling), Advanced sensor support (HRM, stride, power), Running Power training, Workout editor and planner, TrainingPeaks/Final Surge sync, HealthKit integration, Data export (GPX, TCX, KML, PWX, CSV)

**Features:** Apple Watch app

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly Subscription | $4.99 | per month |
| Annual Pro Subscription | $24.99 | per year |

**What reviewers like**

- 💻 Excellent app for running, biking, and other activities
- 🎨 Highly customizable with great features
- 🔗 Seamless integration with various platforms and devices
- 🕰️ Reliable and accurate tracking
- 🏃‍♀️ Fantastic for interval training and coaching

**What reviewers complain about**

- 🐛 Frequent crashes and bugs, especially with recent updates
- 🔋 High battery drain, especially on Apple Watch
- 🔍 Inconsistent distance and pace tracking
- 🤖 Poor integration with some platforms like Garmin and Strava
- 🤔 Confusing and outdated user interface

**Reported bugs**

- Frequent app crashes, especially when starting a workout
- Inconsistent distance and pace tracking, especially on treadmill
- Issues with syncing data between iPhone and Apple Watch
- Problems with audio cues and notifications not working as expected

**Requested features**

- Improved Apple Watch app with standalone functionality
- Better integration with popular fitness platforms
- More customization options for data fields and audio cues
- Ability to import and sync workouts from other sources
- Improved battery life optimization


### O2 Renew

[App page](https://appshunter.io/ios/app/o2-renew/id6784780270)

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

**In-app purchases:** none


## Frequently asked questions

### Is iSmoothRun free?

iSmoothRun costs $4.99, and also offers in-app purchases.

### Is O2 Renew free?

O2 Renew is free to download, with no in-app purchases.

### Do iSmoothRun or O2 Renew have ads?

Neither iSmoothRun nor O2 Renew shows ads.

### Which is updated more often, iSmoothRun or O2 Renew?

iSmoothRun ships an update every 2 months, and O2 Renew every 4 weeks. Most recently, iSmoothRun was updated on October 15, 2026 and O2 Renew on October 1, 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.*