# DFM CDE vs Offgrid Tower Security

The clearest difference is update cadence: Offgrid Tower Security at monthly against DFM CDE's every 4 months. DFM CDE's advantage is iOS requirement (8.0 vs 15.0). 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.

DFM CDE ships an update every 4 months, Offgrid Tower Security monthly. The most recent releases landed on September 22, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | DFM CDE | Offgrid Tower Security |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 46 MB | 48 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Digital Facilities Management Ltd](https://appshunter.io/developer/1767571840) | [Tower Security](https://appshunter.io/developer/1825885565) |

## What reviewers say

### DFM CDE

[App page](https://appshunter.io/ios/app/dfm-cde/id1500254537)

**Features:** macOS Compatibility

**In-app purchases:** none


### Offgrid Tower Security

[App page](https://appshunter.io/ios/app/offgrid-tower-security/id6748463303)

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

**In-app purchases:** none


## Frequently asked questions

### Is DFM CDE free?

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

### Is Offgrid Tower Security free?

Offgrid Tower Security is free to download, with no in-app purchases.

### Do DFM CDE or Offgrid Tower Security have ads?

Neither DFM CDE nor Offgrid Tower Security shows ads.

### Which is updated more often, DFM CDE or Offgrid Tower Security?

DFM CDE ships an update every 4 months, and Offgrid Tower Security monthly. Most recently, DFM CDE was updated on September 22, 2026 and Offgrid Tower Security on September 11, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*