# SubSum vs Island Pocket

The clearest difference is in-app purchases: SubSum at none against Island Pocket's 11. Island Pocket's advantage is update cadence (every 2 days vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Island Pocket sells 11 in-app purchases, starting at $0.99 per month. SubSum asks for nothing beyond the download.

SubSum ships an update every 4 months, Island Pocket every 2 days. The most recent releases landed on October 12, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SubSum | Island Pocket |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (15 ratings)](https://appshunter.io/ios/app/island-pocket/id6754898359/reviews)** |
| Number of ratings | — | **15** |
| Positive reviews | — | 97.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 2 MB | 66 MB |
| Requires iOS | 17 | **16.1** |
| Devices | iPhone, iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [桥 汪](https://appshunter.io/developer/1658027527) | [龙林 武](https://appshunter.io/developer/1848363876) |

## What reviewers say

### SubSum

[App page](https://appshunter.io/ios/app/subsum/id6754885566)

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

**In-app purchases:** none


### Island Pocket

[App page](https://appshunter.io/ios/app/island-pocket/id6754898359)

Organize and display essential information like pickup codes, tickets, and notes using Dynamic Island and Lock Screen widgets. Access key details offline and on your Apple Watch without needing to unlock your device.

**Highlights:** Dynamic Island information display, Offline recognition of codes and tickets, Lock Screen widgets, Apple Watch support, Customizable logos and titles, Local data processing

**Features:** macOS Compatibility, Siri integration, Apple Wallet, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员（首周免费） | $0.99 | per month |
| 年度会员 | $2.99 | per year |
| 小杯咖啡 | $0.99 | one-time |
| 速溶咖啡 | $0.99 | one-time |
| 永久会员（5 折） | $2.99 | one-time |
| 永久会员（6 折） | $2.99 | one-time |
| 大杯咖啡 | $3.99 | one-time |
| 疯狂星期四 | $6.99 | one-time |
| 永久会员 | $8.99 | one-time |
| 特大杯咖啡 | $9.99 | one-time |
| 咖啡机 | $99.99 | one-time |


## Frequently asked questions

### Is SubSum free?

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

### Is Island Pocket free?

Island Pocket is free to download, with in-app purchases available.

### Do SubSum or Island Pocket have ads?

Neither SubSum nor Island Pocket shows ads.

### Which is updated more often, SubSum or Island Pocket?

SubSum ships an update every 4 months, and Island Pocket every 2 days. Most recently, SubSum was updated on October 12, 2026 and Island Pocket on October 31, 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.*