# Trinity Airways vs SUM Air

The clearest difference is review sentiment: SUM Air at 100% against Trinity Airways's 13%. SUM Air also leads on monetization model (free vs free with in-app purchases). 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.

Trinity Airways ships an update fortnightly, SUM Air every 3 weeks. The most recent releases landed on October 24, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Trinity Airways | SUM Air |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/trinity-airways/id564901451/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 13.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 90 MB | 24 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Trinity Airways Co., Ltd.](https://appshunter.io/developer/1532827761) | [SUMAIR Co., Ltd.](https://appshunter.io/developer/1700207324) |

## What reviewers say

### Trinity Airways

[App page](https://appshunter.io/ios/app/trinity-airways/id564901451)

Book flights, manage reservations, and access ancillary services for a smoother travel experience. This app offers convenient payment options, fare searching, and multi-language support for domestic and international journeys.

**Highlights:** Faster flight booking and reservation management, Simple payment with multiple options, Ancillary services like seat selection and meal pre-order, Lowest fare search with Low Fare Calendar, Multi-currency and multi-language support, In-flight meal pre-order, Advance seat selection

**Features:** Apple Wallet

**In-app purchases:** none


### SUM Air

[App page](https://appshunter.io/ios/app/sum-air/id6759547908)

Book flights, manage your itinerary, and access mobile boarding passes for a seamless travel experience. Enjoy app-exclusive promotions and real-time updates for domestic travel within Korea.

**Highlights:** Real-time flight booking, Manage bookings and cancellations, Mobile boarding pass, Multiple payment options, App-exclusive promotions, Real-time push notifications

**Features:** Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Trinity Airways free?

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

### Is SUM Air free?

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

### Do Trinity Airways or SUM Air have ads?

Neither Trinity Airways nor SUM Air shows ads.

### Which is updated more often, Trinity Airways or SUM Air?

Trinity Airways ships an update fortnightly, and SUM Air every 3 weeks. Most recently, Trinity Airways was updated on October 24, 2026 and SUM Air on October 20, 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.*