# i vs ProPump Calc

The clearest difference is in-app purchases: i at none against ProPump Calc's 2. ProPump Calc's advantage is update cadence (every 3 weeks vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ProPump Calc sells 2 in-app purchases, starting at $8.99 per month. i asks for nothing beyond the download.

i ships an update every 6 weeks, ProPump Calc every 3 weeks. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | i | ProPump Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 25 MB | 54 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Grandfar](https://appshunter.io/developer/1811247874) | [Brandon Wright](https://appshunter.io/developer/1828458254) |

## What reviewers say

### i

[App page](https://appshunter.io/ios/app/i-grandfar/id6745197238)

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

**In-app purchases:** none


### ProPump Calc

[App page](https://appshunter.io/ios/app/propump-calc-qf/id6759294021)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ProPump Monthly Subscription | $8.99 | per month |
| ProPump Yearly Subscription | $89.99 | per year |


## Frequently asked questions

### Is i free?

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

### Is ProPump Calc free?

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

### Do i or ProPump Calc have ads?

Neither i nor ProPump Calc shows ads.

### Which is updated more often, i or ProPump Calc?

i ships an update every 6 weeks, and ProPump Calc every 3 weeks. Most recently, i was updated on October 30, 2026 and ProPump Calc 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.*