SYTTPMS vs ITPMS（K）
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.
ITPMS（K）
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汽车、货车蓝牙胎压传感器专用APP，通过手机蓝牙可接收轮胎内的胎压信息和异常报警。
Screenshots
Verdict
SYTTPMS and ITPMS（K） are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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, ITPMS（K） every 5 weeks. The most recent releases landed on September 13, 2026 and September 8, 2026 respectively.
| Parameter | SYTTPMS | ITPMS（K） |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 5 weeks — 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 | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen Shenyongtong Industry Co., Ltd. | Shenzhen CAREUD Technology Co.,Ltd |
In-app purchases
SYTTPMS
No in-app purchases
ITPMS（K）
No in-app purchases
