# RTB2 vs IV Push Timer

The clearest difference is in-app purchases: IV Push Timer at none against RTB2's 1. RTB2's advantage is iOS requirement (15.1 vs 26.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RTB2 sells 1 in-app purchase, starting at $2.99 per month. IV Push Timer asks for nothing beyond the download.

RTB2 ships an update every 5 days, IV Push Timer every 4 days. The most recent releases landed on September 26, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | RTB2 | IV Push Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rtb2-respiratory-reference/id6757658847/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | Freemium | — |
| Size | 46 MB | 3 MB |
| Requires iOS | **15.1** | 26.2 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Bbytetechworks LLC](https://appshunter.io/developer/1844731958) | [Michael Gibson](https://appshunter.io/developer/1880931823) |

## What reviewers say

### RTB2

[App page](https://appshunter.io/ios/app/rtb2-respiratory-reference/id6757658847)

This medical reference app provides respiratory therapists and students with essential clinical tools. It features ventilator mode guides, therapy calculators, and oxygen guidance in a clean, organized format for quick access in critical care settings.

**Highlights:** Ventilator mode reference guides, Respiratory therapy clinical calculators, Oxygen device guidance, Structured respiratory care information, Fast clinical review format, Advanced calculators (Pro)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RTB2 Pro | $2.99 | per month |


### IV Push Timer

[App page](https://appshunter.io/ios/app/iv-push-timer/id6759823376)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RTB2 free?

RTB2 is free to download, with in-app purchases available.

### Is IV Push Timer free?

IV Push Timer is free to download, with no in-app purchases.

### Do RTB2 or IV Push Timer have ads?

Neither RTB2 nor IV Push Timer shows ads.

### Which is updated more often, RTB2 or IV Push Timer?

RTB2 ships an update every 5 days, and IV Push Timer every 4 days. Most recently, RTB2 was updated on September 26, 2026 and IV Push Timer on September 12, 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.*