# Amazon Upshift vs Knock Messaging

The clearest difference is update cadence: Knock Messaging at every 5 days against Amazon Upshift's every 5 months. Amazon Upshift's advantage is iOS requirement (12.0 vs 15.0). 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.

Amazon Upshift ships an update every 5 months, Knock Messaging every 5 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Amazon Upshift | Knock Messaging |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 5 days** |
| Size | 8 MB | 36 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Discourse](https://appshunter.io/developer/1173672075) | [Baseline Polls Limited Liability Company](https://appshunter.io/developer/1631404664) |

## What reviewers say

### Amazon Upshift

[App page](https://appshunter.io/ios/app/amazon-upshift/id6446920748)

**In-app purchases:** none


### Knock Messaging

[App page](https://appshunter.io/ios/app/knock-messaging/id6756548501)

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

**In-app purchases:** none


## Frequently asked questions

### Is Amazon Upshift free?

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

### Is Knock Messaging free?

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

### Do Amazon Upshift or Knock Messaging have ads?

Neither Amazon Upshift nor Knock Messaging shows ads.

### Which is updated more often, Amazon Upshift or Knock Messaging?

Amazon Upshift ships an update every 5 months, and Knock Messaging every 5 days. Most recently, Amazon Upshift was updated on October 25, 2026 and Knock Messaging on October 25, 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.*