# SMI vs TWDIW

The clearest difference is iOS requirement: SMI at 11.0 against TWDIW's 13.0. On price, update cadence, 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.

SMI ships an update monthly, TWDIW every 3 weeks. Both last shipped on September 14, 2026.

## The numbers

| Metric | SMI | TWDIW |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (3 ratings)](https://appshunter.io/ios/app/smi/id1486550663/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 194 MB | 198 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [FutureDial Inc.](https://appshunter.io/developer/1163960008) | [數位發展部](https://appshunter.io/developer/1759963812) |

## What reviewers say

### SMI

[App page](https://appshunter.io/ios/app/smi/id1486550663)

Streamline device testing and grading for quick, accurate assessments. This tool simplifies the triage process for mobile devices.

**Highlights:** Device triage testing, Grading functionality, Quick assessments, Accurate results, Mobile device inspection

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

**In-app purchases:** none


### TWDIW

[App page](https://appshunter.io/ios/app/twdiw/id6742222992)

**In-app purchases:** none


## Frequently asked questions

### Is SMI free?

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

### Is TWDIW free?

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

### Do SMI or TWDIW have ads?

Neither SMI nor TWDIW shows ads.

### Which is updated more often, SMI or TWDIW?

SMI ships an update monthly, and TWDIW every 3 weeks. Most recently, SMI was updated on September 14, 2026 and TWDIW on September 14, 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.*