# Software&Engineering vs Indigo PDF

The clearest difference is update cadence: Indigo PDF at every 4 days against Software&Engineering's every 55 months. Software&Engineering's advantage is iOS requirement (6.0 vs 13.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Software&Engineering ships an update every 55 months, Indigo PDF every 4 days. The most recent releases landed on October 5, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Software&Engineering | Indigo PDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 55 months | **Every 4 days** |
| Size | 1 MB | 6 MB |
| Requires iOS | **6.0** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Optimitek LLC](https://appshunter.io/developer/404404521) | [Sean Murray](https://appshunter.io/developer/1881318444) |

## What reviewers say

### Software&Engineering

[App page](https://appshunter.io/ios/app/software-and-engineering/id422496069)

**Features:** macOS Compatibility

**In-app purchases:** none


### Indigo PDF

[App page](https://appshunter.io/ios/app/indigo-pdf/id6759861292)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Software&Engineering free?

Software&Engineering is free to download, with no in-app purchases.

### Is Indigo PDF free?

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

### Do Software&Engineering or Indigo PDF have ads?

Neither Software&Engineering nor Indigo PDF shows ads.

### Which is updated more often, Software&Engineering or Indigo PDF?

Software&Engineering ships an update every 55 months, and Indigo PDF every 4 days. Most recently, Software&Engineering was updated on October 5, 2026 and Indigo PDF on October 6, 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.*