# IoTシステム A･ISys vs LambLock

The clearest difference is in-app purchases: IoTシステム A･ISys at none against LambLock's 15. IoTシステム A･ISys also leads on ads (none vs shown) and device support (3 vs 1). LambLock's advantage is update cadence (weekly vs every 7 months). On price and iOS requirement there is nothing between them.

Both are free to download. LambLock sells 11 in-app purchases, starting at $4.99 per month. IoTシステム A･ISys asks for nothing beyond the download.

IoTシステム A･ISys ships an update every 7 months, LambLock weekly. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | IoTシステム A･ISys | LambLock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (11 ratings)](https://appshunter.io/ios/app/lamblock-screen-time-control/id6478385605/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 74.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 53 MB | 174 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [ACTN K.K.](https://appshunter.io/developer/1519939443) | [KODO Inc.](https://appshunter.io/developer/1732661660) |

## What reviewers say

### IoTシステム A･ISys

[App page](https://appshunter.io/ios/app/iot-aisys/id1615943586)

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

**In-app purchases:** none


### LambLock

[App page](https://appshunter.io/ios/app/lamblock-screen-time-control/id6478385605)

This app helps you regain control of your phone usage by blocking distracting applications. It offers a unique prompt system to curb impulsive scrolling and allows you to set limits on specific apps by time, day, or schedule. Gamified elements make the process engaging and rewarding.

**Highlights:** App blocking for problem apps, Customizable time and schedule limits, Deep-breath prompt for impulsive use, Gamified progress and rewards, Clean UI with animations, Reduces weekly screen time

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dream Sheep PRO (Lite) | $4.99 | per month |
| Dream Sheep PRO (1 Week) | $4.99 | per 7 days |
| Dream Sheep PRO (Lite) | $6.99 | per month |
| Dream Sheep PRO | $19.99 | per month |
| Dream Sheep PRO (Lite) | $35.99 | per year |
| PRO | $39.99 | per year |
| Dream Sheep PRO | $39.99 | per year |
| Dream Sheep PRO(Lite) | $49.99 | per year |
| Dream Sheep PRO | $49.99 | per year |
| PRO | $79.99 | per year |
| Dream Sheep PRO | $79.99 | per year |


## Frequently asked questions

### Is IoTシステム A･ISys free?

IoTシステム A･ISys is free to download, with no in-app purchases.

### Is LambLock free?

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

### Do IoTシステム A･ISys or LambLock have ads?

LambLock shows ads; IoTシステム A･ISys does not.

### Which is updated more often, IoTシステム A･ISys or LambLock?

IoTシステム A･ISys ships an update every 7 months, and LambLock weekly. Most recently, IoTシステム A･ISys was updated on October 16, 2026 and LambLock on October 18, 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.*