O vs Mogu Exercise
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
O
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* Measure your chewing age! * This application is only available for devices that support ARKit FaceTracking (FaceID-enabled devices or devices with Apple A13 Bionic chip or later). Please check the Compatible Devices section of our website (https://www.morson.jp/o-trainer/) for supported models. O-TRAINER is an application that supports your chewing training. It has been created to help those who want to improve their chewing and swallowing ability. Training the ability to chew and swallow not only helps prevent aspiration pneumonia and oral frail. It also extends healthy life span and makes it possible to enjoy eating and talking more. Let's use the O-TRAINER, chew a lot, and stay healthy! With the O-TRAINER, you can * Train your mouth * Measure your chewing age by facing the device's camera while taking a meal * Measure the number of times you chew and the speed at which you chew. * Look back on your meal records
Mogu Exercise
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Every chew trains your face. Every meal transforms your future. Mogu Exercise turns your daily meals into "AR Chewing Fitness." Using ARKit's high-precision face tracking, we detect your chewing movements in real-time and automatically record your count. We've combined fast eating prevention, digestion support, and facial muscle training into one seamless experience. 【Make Meals Fun, Build Habits】 ・Automatic Meal Tracking: Measures chews per bite and automatically saves as one meal session ・Combo Effects for Achievement: Continuous chewing triggers fireworks and motivational feedback ・Traffic Light Countdown: Visual support for target chew count 【Visible Progress, Lasting Habits】 ・Daily/Weekly/Monthly graphs visualize chewing habits ・See in numbers that "you ate slowly today" ・Supports health management, diet, and beauty consciousness 【Perfect For】 ・People who tend to eat quickly ・Those who want to improve meal quality and manage their health ・Anyone focused on jawline and facial muscles ・People who dislike exercise but want to build habits during mealtime 【Privacy-First Design】 All face data processing happens entirely on your device. No data is ever transmitted or stored on external servers. Start with today's meal. Transform your meals into "training for your future self" with Mogu Exercise.
Screenshots
Verdict
The clearest difference is update cadence: O at every 2 weeks against Mogu Exercise's every 6 months. O also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. O sells 2 in-app purchases, starting at $2.99 per month and Mogu Exercise sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
O ships an update every 2 weeks, Mogu Exercise every 6 months. The most recent releases landed on September 29, 2026 and September 30, 2026 respectively.
| Parameter | O | Mogu Exercise |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks — better | Every 6 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 49 MB | 6 MB |
| Age rating | 12+ | 4+ |
| Developer | Morson Japan | Takumi Oda |
In-app purchases
O
- プレミアムプラン(1ヶ月)$2.991 Month
- 広告を削除$2.99
Mogu Exercise
- Baked Sweet Potato$0.49
- Sweet Potato Sweets$1.99
- Sweet Potato Antique$2.99
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- Premium Sweet Potato Set$5.99









