# JMI Grain vs Duffy Grain

JMI Grain and Duffy Grain are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

JMI Grain ships an update monthly, Duffy Grain every 5 weeks. Both last shipped on October 27, 2026.

## The numbers

| Metric | JMI Grain | Duffy Grain |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 weeks |
| Size | 5 MB | 6 MB |
| Requires iOS | 16.0 | 16.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [John Marion, Inc.](https://appshunter.io/developer/1494514095) | [DUFFY GRAIN, INC.](https://appshunter.io/developer/1578918087) |

## What reviewers say

### JMI Grain

[App page](https://appshunter.io/ios/app/jmi-grain/id1497035556)

**In-app purchases:** none


### Duffy Grain

[App page](https://appshunter.io/ios/app/duffy-grain/id1582189645)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JMI Grain free?

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

### Is Duffy Grain free?

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

### Do JMI Grain or Duffy Grain have ads?

Neither JMI Grain nor Duffy Grain shows ads.

### Which is updated more often, JMI Grain or Duffy Grain?

JMI Grain ships an update monthly, and Duffy Grain every 5 weeks. Most recently, JMI Grain was updated on October 27, 2026 and Duffy Grain on October 27, 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.*