Comparison

ServiceBog vs MDA931

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

Head to head

Hjemme mekanikeren

About

ServiceBog

Features

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For the home mechanic that wants to service their own vehicles. With this app it is possible to write down what a what kilometer/miles your vehicles have had which services. It is also possible to send a mail with the service book.

About

MDA931

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.

Screenshots

ServiceBog4 screens

MDA9314 screens

Verdict

The call

The clearest difference is in-app purchases: MDA931 at none against ServiceBog's 4. MDA931 also leads on ads (none vs shown) and iOS requirement (12.0 vs 26.0). On price, update cadence 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. ServiceBog sells 4 one-off in-app purchases. MDA931 asks for nothing beyond the download.

UpkeepUpdate frequency

ServiceBog ships an update every 6 weeks, MDA931 every 2 months. The most recent releases landed on November 2, 2026 and October 27, 2026 respectively.

Scorecard3 real differences · 3 level

ServiceBog versus MDA931: the parameters behind the verdict, then further details
Parameter	ServiceBog	MDA931
Price	Free	Free
Update frequency	Every 6 weeks — better	Every 2 months
Ads	Yes	No — better
In-app purchases	Yes	No — better
Devices	iPhone	iPhone, iPod — better
Requires iOS	26.0	12.0 — better
Further details — not scored
Size	9 MB	4 MB
Age rating	4+	4+
Developer	Dennis Sorensen	杏生卢

In-app purchases

4 purchases

ServiceBog

One-time4

Small tip$1.99
Remove ads$2.99
Medium tip$4.99

Show 1 more

Big tip$7.99

None

MDA931

No in-app purchases

Questions

Is ServiceBog free?

ServiceBog is free to download, with in-app purchases available.

Is MDA931 free?

MDA931 is free to download, with no in-app purchases.

Do ServiceBog or MDA931 have ads?

ServiceBog shows ads; MDA931 does not.

Which is updated more often, ServiceBog or MDA931?

ServiceBog ships an update every 6 weeks, and MDA931 every 2 months. Most recently, ServiceBog was updated on November 2, 2026 and MDA931 on October 27, 2026.