# Instantly AI vs Shadow Security

The clearest difference is in-app purchases: Instantly AI at none against Shadow Security's 1. Instantly AI also leads on update cadence (every 2 months vs every 5 months) and iOS requirement (16.4 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Shadow Security sells 1 in-app purchase, starting at $0.99 per month. Instantly AI asks for nothing beyond the download.

Instantly AI ships an update every 2 months, Shadow Security every 5 months. The most recent releases landed on November 8, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Instantly AI | Shadow Security |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.9 (36 ratings)](https://appshunter.io/ios/app/instantly-ai/id6474658497/reviews)** | — |
| Number of ratings | **36** | — |
| Positive reviews | 58.9% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 5 months |
| Monetization | Free | — |
| Size | 44 MB | 5 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Foo Monk LLC](https://appshunter.io/developer/1722213325) | [Stephen Luadzers](https://appshunter.io/developer/1867049030) |

## What reviewers say

### Instantly AI

[App page](https://appshunter.io/ios/app/instantly-ai/id6474658497)

This app provides on-the-go email management. Read replies, quickly respond or forward messages, and search your inbox using various filters.

**Highlights:** Read emails on the go, Quickly reply to emails, Forward emails, Search emails with filters, Manage Unibox

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Efficient email outreach automation
- 👍 Clean and intuitive interface
- 💡 Powerful features like campaign sequencing and inbox warm-up
- 👍 Unibox for managing multiple inboxes
- 🚀 Quick and easy to use

**What reviewers complain about**

- 💰 Expensive subscriptions and hidden costs
- 🐛 App is basically useless
- 🐛 Cannot sign in
- 🐛 Many bugs and glitches
- 🐛 App can be confusing at first

**Reported bugs**

- Cannot sign in via Google or set password
- Same emails showing up repeatedly in unibox
- No send button for replies on iPhone
- App logs out every time app is closed
- App keeps logging out every few hours

**Requested features**

- More options for campaign visibility
- Ability to change campaign copy in app
- In-depth notification settings
- Add more features to notifications
- Keep me signed in option


### Shadow Security

[App page](https://appshunter.io/ios/app/shadow-security/id6759615832)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Shadow Security Monthly | $0.99 | per month |


## Frequently asked questions

### Is Instantly AI free?

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

### Is Shadow Security free?

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

### Do Instantly AI or Shadow Security have ads?

Neither Instantly AI nor Shadow Security shows ads.

### Which is updated more often, Instantly AI or Shadow Security?

Instantly AI ships an update every 2 months, and Shadow Security every 5 months. Most recently, Instantly AI was updated on November 8, 2026 and Shadow Security on November 9, 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.*