# Predictive Forecasting vs Quake & Shake

The clearest difference is in-app purchases: Quake & Shake at none against Predictive Forecasting's 1. Quake & Shake also leads on ads (none vs shown) and update cadence (every 4 days vs every 115 months). On price and iOS requirement there is nothing between them.

Both are free to download. Predictive Forecasting sells 1 one-off in-app purchase. Quake & Shake asks for nothing beyond the download.

Predictive Forecasting ships an update every 115 months, Quake & Shake every 4 days. The most recent releases landed on October 9, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Predictive Forecasting | Quake & Shake |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 115 months | **Every 4 days** |
| Size | 7 MB | 24 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Ramalingam Sivaramakrishnan](https://appshunter.io/developer/892706271) | [Martin Bateson](https://appshunter.io/developer/547075176) |

## What reviewers say

### Predictive Forecasting

[App page](https://appshunter.io/ios/app/predictive-forecasting-speed/id1129858835)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |


### Quake & Shake

[App page](https://appshunter.io/ios/app/quake-and-shake/id6757167597)

**In-app purchases:** none


## Frequently asked questions

### Is Predictive Forecasting free?

Predictive Forecasting is free to download, with in-app purchases available.

### Is Quake & Shake free?

Quake & Shake is free to download, with no in-app purchases.

### Do Predictive Forecasting or Quake & Shake have ads?

Predictive Forecasting shows ads; Quake & Shake does not.

### Which is updated more often, Predictive Forecasting or Quake & Shake?

Predictive Forecasting ships an update every 115 months, and Quake & Shake every 4 days. Most recently, Predictive Forecasting was updated on October 9, 2026 and Quake & Shake on October 12, 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.*