# Replex vs BloodOxygenMonitor

The clearest difference is update cadence: BloodOxygenMonitor at every 2 weeks against Replex's monthly. BloodOxygenMonitor also leads on iOS requirement (18.5 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Replex sells 5 in-app purchases, starting at $3.99 per 7 days and BloodOxygenMonitor sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Replex ships an update monthly, BloodOxygenMonitor every 2 weeks. The most recent releases landed on September 25, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Replex | BloodOxygenMonitor |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Freemium | — |
| Size | 95 MB | 49 MB |
| Requires iOS | 26.0 | **18.5** |
| Devices | iPhone, Apple Watch | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Alexander Ryakhin](https://appshunter.io/developer/1588418795) | [智敏 焦](https://appshunter.io/developer/1806339985) |

## What reviewers say

### Replex

[App page](https://appshunter.io/ios/app/replex-workout-tracker/id6476805884)

Log your gym and calisthenics routines with this comprehensive fitness planner. Track sets, reps, and weight, analyze your progress with detailed analytics, and sync seamlessly across devices. Achieve your fitness goals with intelligent workout management.

**Highlights:** Workout tracking from iPhone and Apple Watch, Comprehensive exercise library with muscle map, Customizable workout templates, Detailed analytics and progress visualization, Calendar integration for scheduling, iCloud sync across devices

**Features:** Family Sharing, Siri integration, Apple Watch app

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $3.99 | per 7 days |
| Monthly Subscription | $5.99 | per month |
| Annual Subscription | $29.99 | per year |
| Annual Subscription | $39.99 | per year |
| Lifetime Access | $79.99 | one-time |


### BloodOxygenMonitor

[App page](https://appshunter.io/ios/app/bloodoxygenmonitor/id6756411122)

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Yearly | $4.99 | per year |
| Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Replex free?

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

### Is BloodOxygenMonitor free?

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

### Do Replex or BloodOxygenMonitor have ads?

Neither Replex nor BloodOxygenMonitor shows ads.

### Which is updated more often, Replex or BloodOxygenMonitor?

Replex ships an update monthly, and BloodOxygenMonitor every 2 weeks. Most recently, Replex was updated on September 25, 2026 and BloodOxygenMonitor on September 16, 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.*