GPSP vs TRETTITRE
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GPSP
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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.
TRETTITRE
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纯粹声学（深圳）科技有限公司研发的专业蓝牙音响控制软件，您可以通过连接音响设备，对其进行开关机、调节音量、灯光以及声音曲线风格的切换，等等。
Screenshots
Verdict
The clearest difference is iOS requirement: GPSP at 9.0 against TRETTITRE's 12.0. 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
GPSP ships an update every 2 months, TRETTITRE every 6 weeks. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.
| Parameter | GPSP | TRETTITRE |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 48 MB | 61 MB |
| Age rating | 4+ | 17+ |
| Developer | 杏生 卢 | TRETTITRE (SHENZHEN) TECHNOLOGY CO., LTD. |
In-app purchases
GPSP
No in-app purchases
TRETTITRE
No in-app purchases
