# ePEF vs FlashDetect Nano

The clearest difference is iOS requirement: FlashDetect Nano at 11.0 against ePEF's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

ePEF ships an update every 6 weeks, FlashDetect Nano monthly. The most recent releases landed on September 17, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | ePEF | FlashDetect Nano |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.8 (11 ratings)](https://appshunter.io/ios/app/epef/id1584786339/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 18.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Monthly** |
| Monetization | Free | — |
| Size | 103 MB | 37 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 12+ |
| Developer | [上海朔茂网络科技有限公司](https://appshunter.io/developer/968257135) | [北京卡尤迪医学检验所有限公司](https://appshunter.io/developer/1247756729) |

## What reviewers say

### ePEF

[App page](https://appshunter.io/ios/app/epef/id1584786339)

This app helps manage asthma and COPD symptoms by tracking medication and monitoring acute attacks. It requires a separate digital peak flow meter for readings and provides insights for remote disease management.

**Highlights:** Symptom management for Asthma and COPD, Track medication intake, Monitor acute asthma attacks, Evaluate disease progression, Remote disease management, Requires digital peak flow meter

**Features:** Vision Pro support

**In-app purchases:** none


### FlashDetect Nano

[App page](https://appshunter.io/ios/app/flashdetect-nano/id6465795023)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ePEF free?

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

### Is FlashDetect Nano free?

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

### Do ePEF or FlashDetect Nano have ads?

Neither ePEF nor FlashDetect Nano shows ads.

### Which is updated more often, ePEF or FlashDetect Nano?

ePEF ships an update every 6 weeks, and FlashDetect Nano monthly. Most recently, ePEF was updated on September 17, 2026 and FlashDetect Nano on September 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*