Comparison

Sunstone Batteriemonitor vs A594DSP

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

Head to head

Sunstone Batteriemonitor

About

Sunstone Batteriemonitor

Monitor your rechargeable lithium iron phosphate battery's performance with this utility app. It displays various battery parameters and supports both English and German languages.

Highlights

Connects to Sunstone Power batteries
Displays battery parameters
Supports English language
Supports German language

Features

Read full description

1. Can be connected to Sunstone Power's rechargeable lithium iron phosphate battery to display various parameters. 2. Provide two language modes: English and German.

About

A594DSP

Read full description

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.

Screenshots

Sunstone Batteriemonitor4 screens

A594DSP1 screens

Verdict

The call

Sunstone Batteriemonitor and A594DSP 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

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

Sunstone Batteriemonitor ships an update every 2 months, A594DSP every 5 weeks. The most recent releases landed on September 11, 2026 and September 9, 2026 respectively.

ScorecardNo meaningful differences

Sunstone Batteriemonitor versus A594DSP: the parameters behind the verdict, then further details
Parameter	Sunstone Batteriemonitor	A594DSP
Price	Free	Free
Positive reviews	0.0% of reviews	—
Update frequency	Every 2 months	Every 5 weeks — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPod	iPhone, iPad, iPod — better
Requires iOS	13.0	12.0 — better
Further details — not scored
Size	24 MB	15 MB
Age rating	4+	4+
Developer	志运陈	杏生卢

In-app purchases

None

Sunstone Batteriemonitor

No in-app purchases

None

A594DSP

No in-app purchases

Questions

Is Sunstone Batteriemonitor free?

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

Is A594DSP free?

A594DSP is free to download, with no in-app purchases.

Do Sunstone Batteriemonitor or A594DSP have ads?

Neither Sunstone Batteriemonitor nor A594DSP shows ads.

Which is updated more often, Sunstone Batteriemonitor or A594DSP?

Sunstone Batteriemonitor ships an update every 2 months, and A594DSP every 5 weeks. Most recently, Sunstone Batteriemonitor was updated on September 11, 2026 and A594DSP on September 9, 2026.