# Acadi vs LetsDefend

The clearest difference is in-app purchases: Acadi at none against LetsDefend's 2. Acadi also leads on ads (none vs shown). LetsDefend's advantage is update cadence (every 2 weeks vs every 12 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. LetsDefend sells 2 in-app purchases, starting at $12.99 per month. Acadi asks for nothing beyond the download.

Acadi ships an update every 12 months, LetsDefend every 2 weeks. The most recent releases landed on September 20, 2026 and July 13, 2026 respectively.

## The numbers

| Metric | Acadi | LetsDefend |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/letsdefend/id6741323626/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 9.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 46 MB | 98 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Members](https://appshunter.io/developer/1653824858) | [LetsDefend](https://appshunter.io/developer/1793754609) |

## What reviewers say

### Acadi

[App page](https://appshunter.io/ios/app/acadi-ti-prime/id6469374698)

**Features:** macOS Compatibility

**In-app purchases:** none


### LetsDefend

[App page](https://appshunter.io/ios/app/letsdefend/id6741323626)

Learn cybersecurity with interactive courses and hands-on simulations. Protect against digital threats, join a global community, and advance your career. Master threat detection and analysis with expert guidance.

**Highlights:** Interactive cybersecurity courses, Hands-on threat simulations, Threat detection tools and techniques, Community and expert support, Customizable learning paths, Mobile learning platform

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP+ | $12.99 | per month |
| VIP+ Annual | $89.99 | per year |

**What reviewers like**

- 💡 Structured learning with quizzes and labs
- 👍 Certification opportunities for VIP users

**What reviewers complain about**

- 🐛 Login issues - unable to log in with existing accounts
- 🐛 App not recognizing VIP subscription
- 🐛 Ads preventing progress through content
- 🔒 Lack of trust in company due to login problems

**Reported bugs**

- Login credentials not working in app
- App not recognizing VIP subscription
- Ads blocking progress through content

**Requested features**

- Ability to log in with existing accounts
- Seamless integration between app and website


## Frequently asked questions

### Is Acadi free?

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

### Is LetsDefend free?

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

### Do Acadi or LetsDefend have ads?

LetsDefend shows ads; Acadi does not.

### Which is updated more often, Acadi or LetsDefend?

Acadi ships an update every 12 months, and LetsDefend every 2 weeks. Most recently, Acadi was updated on September 20, 2026 and LetsDefend on July 13, 2026.

---

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