# IRIS10 vs BULO

The clearest difference is update cadence: BULO at every 3 weeks against IRIS10's every 13 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

IRIS10 ships an update every 13 months, BULO every 3 weeks. The most recent releases landed on September 8, 2026 and July 3, 2026 respectively.

## The numbers

| Metric | IRIS10 | BULO |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (5 ratings)](https://appshunter.io/ios/app/bulo/id1509793638/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 42.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 80 MB | 55 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [microtech system,Inc](https://appshunter.io/developer/1135938284) | [BREATHINGS Co., Ltd.](https://appshunter.io/developer/1509793637) |

## What reviewers say

### IRIS10

[App page](https://appshunter.io/ios/app/iris10/id1448336216)

**In-app purchases:** none


### BULO

[App page](https://appshunter.io/ios/app/bulo/id1509793638)

This app guides users through breathing exercises to improve lung health. It offers measurement and training features to help users understand and enhance their respiratory function.

**Highlights:** Breathing exercise guidance, Lung measurement, Respiratory training, Health tracking

**In-app purchases:** none


## Frequently asked questions

### Is IRIS10 free?

IRIS10 is free to download, with no in-app purchases.

### Is BULO free?

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

### Do IRIS10 or BULO have ads?

Neither IRIS10 nor BULO shows ads.

### Which is updated more often, IRIS10 or BULO?

IRIS10 ships an update every 13 months, and BULO every 3 weeks. Most recently, IRIS10 was updated on September 8, 2026 and BULO on July 3, 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.*