# Predwit vs GridDelta

The clearest difference is in-app purchases: GridDelta at none against Predwit's 3. GridDelta also leads on update cadence (every 2 days vs weekly). Predwit's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Predwit sells 3 in-app purchases, starting at $2.99 per 7 days. GridDelta asks for nothing beyond the download.

Predwit ships an update weekly, GridDelta every 2 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | Predwit | GridDelta |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Size | 83 MB | 16 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +17 | 4+ |
| Developer | [Clinton Aikhu](https://appshunter.io/developer/1843479569) | [Fabio Sarmiento](https://appshunter.io/developer/1880444838) |

## What reviewers say

### Predwit

[App page](https://appshunter.io/ios/app/predwit/id6753322940)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $2.99 | per 7 days |
| Monthly Premium | $7.99 | per month |
| Premium Yearly | $39.99 | per year |


### GridDelta

[App page](https://appshunter.io/ios/app/griddelta/id6759739766)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Predwit free?

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

### Is GridDelta free?

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

### Do Predwit or GridDelta have ads?

Neither Predwit nor GridDelta shows ads.

### Which is updated more often, Predwit or GridDelta?

Predwit ships an update weekly, and GridDelta every 2 days. Most recently, Predwit was updated on November 5, 2026 and GridDelta on November 5, 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.*