# ISOTEC vs BIRDNEST

The clearest difference is update cadence: BIRDNEST at fortnightly against ISOTEC's every 3 months. ISOTEC's advantage is iOS requirement (15.0 vs 17.0). 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.

ISOTEC ships an update every 3 months, BIRDNEST fortnightly. The most recent releases landed on September 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | ISOTEC | BIRDNEST |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Size | 29 MB | 84 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ISOTEC GmbH](https://appshunter.io/developer/1476709702) | [Ralf Bohle GmbH](https://appshunter.io/developer/420390733) |

## What reviewers say

### ISOTEC

[App page](https://appshunter.io/ios/app/isotec/id1476709703)

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

**In-app purchases:** none


### BIRDNEST

[App page](https://appshunter.io/ios/app/birdnest/id6446592849)

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

**In-app purchases:** none


## Frequently asked questions

### Is ISOTEC free?

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

### Is BIRDNEST free?

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

### Do ISOTEC or BIRDNEST have ads?

Neither ISOTEC nor BIRDNEST shows ads.

### Which is updated more often, ISOTEC or BIRDNEST?

ISOTEC ships an update every 3 months, and BIRDNEST fortnightly. Most recently, ISOTEC was updated on September 18, 2026 and BIRDNEST on September 22, 2026.

---

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