# Saisun vs SizeGo

The clearest difference is in-app purchases: SizeGo at none against Saisun's 1. SizeGo also leads on iOS requirement (15.1 vs 18.0). Saisun's advantage is ads (none vs shown) and update cadence (monthly vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Saisun sells 1 in-app purchase, starting at $2.99 per month. SizeGo asks for nothing beyond the download.

Saisun ships an update monthly, SizeGo every 2 months. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Saisun | SizeGo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/sizego-size-converter/id6748774607/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | — | Ad-supported |
| Size | 52 MB | 33 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Satoshi Sakuma](https://appshunter.io/developer/1791815850) | [LUCKPLE LLC](https://appshunter.io/developer/1827336126) |

## What reviewers say

### Saisun

[App page](https://appshunter.io/ios/app/saisun-ai-clothes-sizer/id6746278475)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $2.99 | per month |


### SizeGo

[App page](https://appshunter.io/ios/app/sizego-size-converter/id6748774607)

Easily compare and convert clothing sizes across different brands and countries. Find accurate size charts for men, women, and children, with options to browse by category or specific brands. Avoid shopping mistakes with this user-friendly utility.

**Highlights:** International size conversion, Brand-specific size charts, Category-based browsing, Side-by-side comparison, User-friendly interface, Frequent data updates, No account required

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

**In-app purchases:** none


## Frequently asked questions

### Is Saisun free?

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

### Is SizeGo free?

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

### Do Saisun or SizeGo have ads?

SizeGo shows ads; Saisun does not.

### Which is updated more often, Saisun or SizeGo?

Saisun ships an update monthly, and SizeGo every 2 months. Most recently, Saisun was updated on November 8, 2026 and SizeGo on November 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.*