Comparison

Smart Scent Pro vs DL4D

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

About

Smart Scent Pro

Read full description

The Smart Scent Pro can be connected to the scent machine to realize remote control and management. 1. Remote control, complete equipment parameter setting and information acquisition anytime and anywhere 2. Multiple devices can be added at the same time, secondary group management, easy control of all smart scent devices 3. Flexible setting of up to 12 sets of timing tasks and stepless concentration adjustment 4. One-click or batch authorization to share equipment, so that employees or customers can also realize equipment management 5. With low liquid volume alarm function, real-time viewing of equipment liquid volume status 6. Supports Bluetooth, WIFI and base station network equipment at the same time

About

DL4D

Features

Read full description

DL4D 智能座椅控制系统设备连接、网络蓝牙、IP设置功能使用、参数配置、异常提示观看影片时座椅会随着画面的变化运动听音乐时座椅会随着音律进行运动检测座椅上人员的心跳频率和呼吸频率

Screenshots

Smart Scent Pro4 screens

DL4D2 screens

Verdict

The call

The clearest difference is update cadence: DL4D at every 11 days against Smart Scent Pro's every 2 months. DL4D also leads on iOS requirement (13.0 vs 15.0). 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Smart Scent Pro ships an update every 2 months, DL4D every 11 days. The most recent releases landed on October 15, 2026 and September 30, 2026 respectively.

Scorecard2 real differences · 4 level

Smart Scent Pro versus DL4D: the parameters behind the verdict, then further details
Parameter	Smart Scent Pro	DL4D
Price	Free	Free
Update frequency	Every 2 months	Every 11 days — better
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	15.0	13.0 — better
Further details — not scored
Size	20 MB	27 MB
Age rating	4+	4+
Developer	永锦罗	显强余

In-app purchases

None

Smart Scent Pro

No in-app purchases

None

DL4D

No in-app purchases

Questions

Is Smart Scent Pro free?

Smart Scent Pro is free to download, with no in-app purchases.

Is DL4D free?

DL4D is free to download, with no in-app purchases.

Do Smart Scent Pro or DL4D have ads?

Neither Smart Scent Pro nor DL4D shows ads.

Which is updated more often, Smart Scent Pro or DL4D?

Smart Scent Pro ships an update every 2 months, and DL4D every 11 days. Most recently, Smart Scent Pro was updated on October 15, 2026 and DL4D on September 30, 2026.