SETRS vs Polarity pulses
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SETRS
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SETRS排气阀门控制软件，通过安装阀门排气硬件，连接此软件来控制阀门的状态，开启或者关闭，还可以查看当前行车实时数据，例如，发动机转速等
Polarity pulses
This utility app helps audio professionals and enthusiasts quickly test speaker polarity and phase alignment using a phone's microphone. It provides offline analysis for various audio setups, from car stereos to studio monitors, eliminating wiring mistakes and troubleshooting time.
- Audio capture via phone microphone
- Offline local analysis
- Adjustable parameters for different drivers
- Supports car audio, home theater, stage PA, studio monitors
- Eliminates wiring mistakes
- Reduces troubleshooting time
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Reversed speaker phase kills your sound: weak bass, floating soundstage, lost stereo imaging—even golden ears struggle to spot it. Speaker Phase Polarity Check is the essential tool for audio installation & tuning. No expensive gear needed—use your phone’s mic to quickly verify speaker polarity & phase alignment for car, home, stage, line array & studio monitors. Key Features • Audio Capture: Record test tones via your phone microphone • Local Analysis: Offline processing, clear in-phase/reversed result • Adjustable Parameters: Adapt to different drivers, enclosures & setups • All Scenes: Car audio, home theater, stage PA, studio monitors Privacy & Permissions Only Microphone access required for audio sampling. All data processed locally—no uploads to servers. Your privacy is protected. Who It’s For Car audio installers, sound engineers, live sound technicians, audiophiles & shop pros. Eliminate wiring mistakes & cut troubleshooting time.
Screenshots
Verdict
The clearest difference is in-app purchases: SETRS at none against Polarity pulses's 1. SETRS also leads on iOS requirement (8.2 vs 12). Polarity pulses's advantage is update cadence (every 2 days vs every 2 weeks). On price, ads 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
Both are free to download. Polarity pulses sells 1 one-off in-app purchase. SETRS asks for nothing beyond the download.
SETRS ships an update every 2 weeks, Polarity pulses every 2 days. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.
| Parameter | SETRS | Polarity pulses |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 2 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.2 — better | 12 |
| Further details — not scored | ||
| Size | 40 MB | 18 MB |
| Age rating | 4+ | 4+ |
| Developer | 轶飞 唐 | 小慧 罗 |
In-app purchases
SETRS
No in-app purchases
Polarity pulses
- Unlock Full Access$1.99
