# Big C PLUS vs ONESIAM

The clearest difference is ads: Big C PLUS at none against ONESIAM's shown. Big C PLUS also leads on monetization model (free vs ad-supported). ONESIAM's advantage is rating (4.2 vs 4.0). On price, review sentiment, ratings volume and update cadence there is nothing between them.

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

ONESIAM holds the better App Store score, 4.2 against 4.0. Both are backed by a comparable volume of ratings — 20 and 10 respectively. Written reviews complicate that: 18% of Big C PLUS's written reviews are positive against 15% of ONESIAM's, so the app with the better star average is not the one people write more warmly about.

Big C PLUS ships an update every 2 weeks, ONESIAM every 11 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Big C PLUS | ONESIAM |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (20 ratings)](https://appshunter.io/ios/app/big-c-plus/id1423112528/reviews) | **[4.2 (10 ratings)](https://appshunter.io/ios/app/onesiam/id1589053960/reviews)** |
| Number of ratings | **20** | 10 |
| Positive reviews | **18.3% of reviews** | 15.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 11 days** |
| Monetization | **Free** | Ad-supported |
| Size | 104 MB | 124 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Big C Supercenter Public Company Limited](https://appshunter.io/developer/561413535) | [Siam Piwat](https://appshunter.io/developer/1108807945) |

## What reviewers say

### Big C PLUS

[App page](https://appshunter.io/ios/app/big-c-plus/id1423112528)

Shop a wide range of products online with flexible delivery and payment options. Earn and redeem loyalty points, and access exclusive daily coupons for great savings at physical stores.

**Highlights:** 40,000+ products online, Flexible delivery options, Multiple payment choices, Loyalty point tracking, Exclusive daily coupons, QR code for in-store use

**Features:** macOS Compatibility

**In-app purchases:** none


### ONESIAM

[App page](https://appshunter.io/ios/app/onesiam/id1589053960)

This app connects online and offline shopping experiences across multiple retail destinations. It offers a comprehensive range of services, curated content, and exclusive privileges for shoppers. Discover and access services from leading Thai retail and lifestyle destinations.

**Highlights:** Online and offline shopping integration, Access to multiple retail destinations, Curated content and privileges, Full range of services, Bridging digital and physical retail

**In-app purchases:** none


## Frequently asked questions

### Is Big C PLUS free?

Big C PLUS is free to download, with no in-app purchases.

### Is ONESIAM free?

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

### Which has better reviews, Big C PLUS or ONESIAM?

ONESIAM is rated higher. Big C PLUS averages 4.0 out of 5 from 20 ratings, while ONESIAM averages 4.2 from 10 ratings.

### Do Big C PLUS or ONESIAM have ads?

ONESIAM shows ads; Big C PLUS does not.

### Which is updated more often, Big C PLUS or ONESIAM?

Big C PLUS ships an update every 2 weeks, and ONESIAM every 11 days. Most recently, Big C PLUS was updated on October 21, 2026 and ONESIAM on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*