# ExternalBrain外脑 vs esimSubscription

The clearest difference is price: ExternalBrain外脑 at Free against esimSubscription's $1.99. ExternalBrain外脑 also leads on iOS requirement (15.0 vs 17.0). esimSubscription's advantage is update cadence (weekly vs every 5 weeks). On ads, in-app purchases and device support there is nothing between them.

ExternalBrain外脑 is free to download; esimSubscription costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ExternalBrain外脑 ships an update every 5 weeks, esimSubscription weekly. The most recent releases landed on September 17, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | ExternalBrain外脑 | esimSubscription |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[4.9 (39 ratings)](https://appshunter.io/ios/app/esimsubscription/id6759248276/reviews)** |
| Number of ratings | — | **39** |
| Positive reviews | — | 97.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Weekly** |
| Monetization | — | Paid |
| Size | 193 MB | 80 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 9+ | 9+ |
| Developer | [Shenzhen External Brain Technology Co., Ltd.](https://appshunter.io/developer/1563408639) | [文杰 茅](https://appshunter.io/developer/1877000876) |

## What reviewers say

### ExternalBrain外脑

[App page](https://appshunter.io/ios/app/externalbrain/id6670423733)

**Features:** macOS Compatibility

**In-app purchases:** none


### esimSubscription

[App page](https://appshunter.io/ios/app/esimsubscription/id6759248276)

Manage your eSIM plans and subscription details in one convenient place. Track plan cost, expiration dates, and notes with helpful reminders. Supports multiple languages and home screen widgets for easy access.

**Highlights:** eSIM plan management, Subscription details tracking, Cost and expiration date recording, QR code storage, Built-in reminders, Multi-language support, Home screen widgets

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

**In-app purchases:** none


## Frequently asked questions

### Is ExternalBrain外脑 free?

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

### Is esimSubscription free?

esimSubscription costs $1.99, with no in-app purchases.

### Do ExternalBrain外脑 or esimSubscription have ads?

Neither ExternalBrain外脑 nor esimSubscription shows ads.

### Which is updated more often, ExternalBrain外脑 or esimSubscription?

ExternalBrain外脑 ships an update every 5 weeks, and esimSubscription weekly. Most recently, ExternalBrain外脑 was updated on September 17, 2026 and esimSubscription on September 19, 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.*