SYTTPMS vs TPMS CN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SYTTPMS
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智炫（TPMS）TX500/TN500胎压监测报警器，适用于iphone的应用。驾驶者坐在车内配合手机APP就能轻松监控4个轮胎的胎压和胎温。当轮胎出现气压过低或过高、温度过高、传感器电池电量过低等异常情况时，手机会立即发出警示声和震动来提醒驾驶者，使驾驶者及时减速停车检查轮胎,确保安全驾驶。 产品的特点： 1、插接汽车OBD口，即插即用，蓝牙无线连接。 2、当轮胎出现漏气、压力过低或者过高、轮胎温度过高等异常情况时，接收器即刻报警，同时软件界面也进入报警状态。 3、APP支持中文、英文语言设置；四种气压单位（Bar、Psi、Kpa、kgf/cm2） 以及两种温度单位（℃,℉）的设置。 4、APP可自由调换轮胎位置和手动学习传感器，方便用户调整。 DIY TPMS for iphone(TX500) & TPMS for iphone(TN500) from ShenYongtong,are an Tire Pressure Monitoring System(TPMS) to work with IOS APP in a vehicle for realtime monitoring individual tire pressure and temperature once Bluetooth from iphone/ipad connected as monitor to ensure on-road safety. Features 1、Power Supply through the vehicle diagnostic system(OBD),Wireless transmission. 2、Real-time monitoring and display,Audio and visual warning. 3、Converitable language,pressure unit(Bar、Psi 、Kpa、Kgf/cm2) and temperature unit(℃,℉). 4、Free exchange tire position sensor and manual learning.
TPMS CN
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TPMS CN支持亚/欧/美及国产98%以上带胎压系统的车型，可快速读取胎压、胎压编程、胎压学习及激活胎压传感器。便捷、高效、无线传输，设备支持315MHz和433MHz胎压传感器。
Screenshots
Verdict
The clearest difference is update cadence: TPMS CN at monthly against SYTTPMS's every 2 months. On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
SYTTPMS ships an update every 2 months, TPMS CN monthly. Both last shipped on October 1, 2026.
| Parameter | SYTTPMS | TPMS CN |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 1 MB | 100 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Shenyongtong Industry Co., Ltd. | Xi'an Tonglu Car Electronics Co., Ltd |
In-app purchases
SYTTPMS
No in-app purchases
TPMS CN
No in-app purchases
