# Bubble Level + Measure Kit vs CPAP Tracker & Journal

The clearest difference is update cadence: CPAP Tracker & Journal at fortnightly against Bubble Level + Measure Kit's every 3 months. CPAP Tracker & Journal also leads on iOS requirement (15.1 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Bubble Level + Measure Kit sells 1 one-off in-app purchase and CPAP Tracker & Journal sells 1 in-app purchase, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Bubble Level + Measure Kit ships an update every 3 months, CPAP Tracker & Journal fortnightly. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Bubble Level + Measure Kit | CPAP Tracker & Journal |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Paid | — |
| Size | 3 MB | 51 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Sensonet](https://appshunter.io/developer/793745582) | [Epicfy](https://appshunter.io/developer/1815713476) |

## What reviewers say

### Bubble Level + Measure Kit

[App page](https://appshunter.io/ios/app/bubble-level-plus-measure-kit/id806787408)

This utility app turns your device into a high-precision spirit level. Measure angles on any surface with a beautifully designed interface. Available at a special limited-time price.

**Highlights:** High precision spirit level, Angle measurement, Beautifully designed UI, Pocket-sized utility, iPhone and iPad compatible

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $1.99 | one-time |


### CPAP Tracker & Journal

[App page](https://appshunter.io/ios/app/cpap-tracker-and-journal/id6759095168)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |


## Frequently asked questions

### Is Bubble Level + Measure Kit free?

Bubble Level + Measure Kit is free to download, with in-app purchases available.

### Is CPAP Tracker & Journal free?

CPAP Tracker & Journal is free to download, with in-app purchases available.

### Do Bubble Level + Measure Kit or CPAP Tracker & Journal have ads?

Neither Bubble Level + Measure Kit nor CPAP Tracker & Journal shows ads.

### Which is updated more often, Bubble Level + Measure Kit or CPAP Tracker & Journal?

Bubble Level + Measure Kit ships an update every 3 months, and CPAP Tracker & Journal fortnightly. Most recently, Bubble Level + Measure Kit was updated on November 1, 2026 and CPAP Tracker & Journal on October 31, 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.*