# Robodrill Recertification vs Diff Checker

The clearest difference is in-app purchases: Robodrill Recertification at none against Diff Checker's 2. Diff Checker's advantage is update cadence (fortnightly vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Diff Checker sells 2 in-app purchases, starting at $7.99 per month. Robodrill Recertification asks for nothing beyond the download.

Robodrill Recertification ships an update every 2 months, Diff Checker fortnightly. The most recent releases landed on May 17, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Robodrill Recertification | Diff Checker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 50 MB | 79 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [FANUC America Corporation](https://appshunter.io/developer/1494232034) | [Edusoft Limited](https://appshunter.io/developer/1836364875) |

## What reviewers say

### Robodrill Recertification

[App page](https://appshunter.io/ios/app/robodrill-recertification/id6449467691)

**Features:** macOS Compatibility

**In-app purchases:** none


### Diff Checker

[App page](https://appshunter.io/ios/app/diff-checker-compare-text/id6753902567)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription Monthly | $7.99 | per month |
| Premium Subscription Yearly | $49.99 | per year |


## Frequently asked questions

### Is Robodrill Recertification free?

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

### Is Diff Checker free?

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

### Do Robodrill Recertification or Diff Checker have ads?

Neither Robodrill Recertification nor Diff Checker shows ads.

### Which is updated more often, Robodrill Recertification or Diff Checker?

Robodrill Recertification ships an update every 2 months, and Diff Checker fortnightly. Most recently, Robodrill Recertification was updated on May 17, 2026 and Diff Checker on May 16, 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.*