# LockDown Browser vs Supply Grain

The clearest difference is update cadence: LockDown Browser at every 5 weeks against Supply Grain's every 3 months. Supply Grain's advantage is device support (3 vs 1) and iOS requirement (8.0 vs 15.0). On price, ads and in-app purchases there is nothing between them.

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

LockDown Browser ships an update every 5 weeks, Supply Grain every 3 months. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | LockDown Browser | Supply Grain |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.2 (4K ratings)](https://appshunter.io/ios/app/lockdown-browser/id659101775/reviews)** | — |
| Number of ratings | **4K** | — |
| Positive reviews | 7.6% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free | — |
| Size | 17 MB | 80 MB |
| Requires iOS | 15.0 | **8.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Respondus Inc.](https://appshunter.io/developer/365544611) | [Processim Labs S.A](https://appshunter.io/developer/1363272635) |

## What reviewers say

### LockDown Browser

[App page](https://appshunter.io/ios/app/lockdown-browser/id659101775)

This application creates a secure browser environment for online exams, preventing access to other applications, websites, or device functions. It ensures the integrity of assessments by locking users into the exam until submission. It is compatible with specific learning systems and can be used with proctoring systems if enabled by an instructor.

**Highlights:** Locks down exam environment, Prevents switching applications, Blocks access to other URLs, Disables screenshots, Prohibits copying or printing, Integrates with learning systems

**In-app purchases:** none

**What reviewers like**

- 🚀 Works well on iPad
- 🔒 Secures exams
- 👍 Helpful for online tests

**What reviewers complain about**

- 🐛 Crashes and freezes frequently
- 🔒 Locks down devices too aggressively
- 👎 Unreliable and glitchy
- 💤 Slow and unresponsive
- 🔋 Drains device battery

**Reported bugs**

- Fails to load tests and quizzes
- Prevents device power off and exit
- Incompatible with other apps like Canvas
- Randomly kicks users out of exams

**Requested features**

- Improved compatibility with iPads
- Better error handling and recovery
- Streamlined setup and onboarding
- More user-friendly interface


### Supply Grain

[App page](https://appshunter.io/ios/app/supply-grain/id1593468685)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is LockDown Browser free?

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

### Is Supply Grain free?

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

### Do LockDown Browser or Supply Grain have ads?

Neither LockDown Browser nor Supply Grain shows ads.

### Which is updated more often, LockDown Browser or Supply Grain?

LockDown Browser ships an update every 5 weeks, and Supply Grain every 3 months. Most recently, LockDown Browser was updated on October 12, 2026 and Supply Grain on October 5, 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.*