# AETS vs PF One

The clearest difference is iOS requirement: AETS at 9.0 against PF One's 13.0. 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.

AETS ships an update every 6 weeks, PF One every 3 weeks. The most recent releases landed on October 2, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | AETS | PF One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pf-one/id6751495309/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 33 MB | 29 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [成都爱维译科技有限公司](https://appshunter.io/developer/1432427704) | [Shenzhen Pailefei Consulting Services Co., Ltd.](https://appshunter.io/developer/1832721362) |

## What reviewers say

### AETS

[App page](https://appshunter.io/ios/app/aets/id1493245010)

**Features:** macOS Compatibility

**In-app purchases:** none


### PF One

[App page](https://appshunter.io/ios/app/pf-one/id6751495309)

This aviation dictionary and pilot toolbox offers a vast database of over 20,000 aviation terms, with Chinese-English support. It features category browsing, search, airport codes, and practical tools like an interview checklist and flight time calculator. Access information offline and benefit from continuous updates.

**Highlights:** Extensive aviation database (20,000+ entries), Chinese-English paired entries, Category filters and search, Airport and code reference, Pilot interview checklist, Flight time calculator, Offline access

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

**In-app purchases:** none


## Frequently asked questions

### Is AETS free?

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

### Is PF One free?

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

### Do AETS or PF One have ads?

Neither AETS nor PF One shows ads.

### Which is updated more often, AETS or PF One?

AETS ships an update every 6 weeks, and PF One every 3 weeks. Most recently, AETS was updated on October 2, 2026 and PF One on October 13, 2026.

---

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