# SessionBell vs Knockbox

SessionBell and Knockbox are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

SessionBell ships an update every 2 days, Knockbox daily. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SessionBell | Knockbox |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 days | **Daily** |
| Size | 6 MB | 7 MB |
| Requires iOS | 17.2 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [越 孙](https://appshunter.io/developer/1879509150) | [苗 苗](https://appshunter.io/developer/6791624017) |

## What reviewers say

### SessionBell

[App page](https://appshunter.io/ios/app/sessionbell-ai-agent-alerts/id6801045681)

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

**In-app purchases:** none


### Knockbox

[App page](https://appshunter.io/ios/app/knockbox-self-hosted-push/id6811317906)

**In-app purchases:** none


## Frequently asked questions

### Is SessionBell free?

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

### Is Knockbox free?

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

### Do SessionBell or Knockbox have ads?

Neither SessionBell nor Knockbox shows ads.

### Which is updated more often, SessionBell or Knockbox?

SessionBell ships an update every 2 days, and Knockbox daily. Most recently, SessionBell was updated on October 10, 2026 and Knockbox on October 6, 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.*