# Formula Predict vs GridCall

The clearest difference is in-app purchases: Formula Predict at none against GridCall's 2. Formula Predict also leads on ads (none vs shown). GridCall's advantage is iOS requirement (13.0 vs 18.6). On price, update cadence and device support there is nothing between them.

Both are free to download. GridCall sells 2 in-app purchases, starting at $3.99 per month. Formula Predict asks for nothing beyond the download.

Formula Predict ships an update every 6 days, GridCall weekly. The most recent releases landed on September 30, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Formula Predict | GridCall |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 6 days** | Weekly |
| Size | 30 MB | 79 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 12+ | 12+ |
| Developer | [Johannes Mattheus Van Kempen](https://appshunter.io/developer/1846616109) | [Bilgehan Tekin](https://appshunter.io/developer/1896518451) |

## What reviewers say

### Formula Predict

[App page](https://appshunter.io/ios/app/formula-predict/id6758523600)

**Features:** macOS Compatibility

**In-app purchases:** none


### GridCall

[App page](https://appshunter.io/ios/app/gridcall-prediction-league/id6767899812)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| GridCall Premium Monthly | $3.99 | per month |
| GridCall Premium Yearly | $29.99 | per year |


## Frequently asked questions

### Is Formula Predict free?

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

### Is GridCall free?

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

### Do Formula Predict or GridCall have ads?

GridCall shows ads; Formula Predict does not.

### Which is updated more often, Formula Predict or GridCall?

Formula Predict ships an update every 6 days, and GridCall weekly. Most recently, Formula Predict was updated on September 30, 2026 and GridCall on October 22, 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.*