Comparison

A894DSP vs BEMS

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

Head to head

About

A894DSP

Features

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After connecting App to Car Amplifier with Integrated DSP, EQ, BASS, TIME ALIGNMENT, PHASE, MUTE, FILTER , SAVE SOUND SETTING TO PHONE, SAVE SOUND SETTING TO AMPLIFIER, LOAD SOUND SETTING FROM PHONE, RCA OUTPUT etc could be controlled through this App. How to use: 1.Install App and turn on power of car 2. Turn on Bluetooth on your iPhone 3,Open App and wait for around 5 seconds, then click “Connect” icon in left corner of bottom. Amplifier will be connected to App automatically. 4.DIY you preferred sound and then click “Save to AMP” icon to save. Or click “ Save to Phone” to save. Note： 1.Do not exit app during saving and do not turn off power supply, program may be shut down caused by this.

About

BEMS

Features

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站点概览：支持多站点数据采集，呈现电站基本信息以及PV发电功率、充放电量、收益等指标实时运行：支持多站点设备实时运行状态查看，作为多站管理的集中入口故障告警：支持多站点告警汇总及单站告警查看，根据设备类型、消息类型以及状态进行筛选展示统计报表：分日周月维度生成电量、收益等报表，分析总结电站情况，有针对性改善电站

Screenshots

A894DSP3 screens

BEMS4 screens

Verdict

The call

The clearest difference is iOS requirement: A894DSP at 9.0 against BEMS's 13.0. On price, update cadence, 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

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

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 5, 2026 and September 28, 2026 respectively.

Scorecard1 real difference · 5 level

A894DSP versus BEMS: the parameters behind the verdict, then further details
Parameter	A894DSP	BEMS
Price	Free	Free
Update frequency	Every 2 months	Every 2 months
Ads	No	No
In-app purchases	No	No
Devices	iPhone, iPod	iPhone, iPod
Requires iOS	9.0 — better	13.0
Further details — not scored
Size	18 MB	24 MB
Age rating	4+	4+
Developer	杏生卢	GuangDong Didu NEW Energy Co.,Ltd

In-app purchases

None

A894DSP

No in-app purchases

None

BEMS

No in-app purchases

Questions

Is A894DSP free?

A894DSP is free to download, with no in-app purchases.

Is BEMS free?

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

Do A894DSP or BEMS have ads?

Neither A894DSP nor BEMS shows ads.

Which is updated more often, A894DSP or BEMS?

A894DSP ships an update every 2 months, and BEMS every 2 months. Most recently, A894DSP was updated on October 5, 2026 and BEMS on September 28, 2026.