Comparison

我爱PDF vs Decibel Meter

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

Head to head
About

我爱PDF

Features
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我爱PDF支持PDF转Word,Word转PDF,PDF转图片,图片转PDF,PDF转Excel,Excel转PDF,PDF转PPT,PPT转PDF,PDF转CAD,CAD转PDF,CAJ转PDF,PDF转OFD,OFD转PDF,PDF压缩,图片压缩,音频格式转换,视频格式转换...等116种文件格式互转,让您的工作和学习更高效更轻松。

About

Decibel Meter

Features
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NoiseScope is a personal environmental noise analyzer for real-time sound measurement, sleep environment review, and long-term noise records. Open the app and measurement starts automatically. You can check current dB levels, peaks, LAeq trends, weighting modes, response modes, low-frequency indicators, and noise profile insights in a focused full- screen interface. Key features: - Real-time decibel measurement - LAeq, peak, A/C/Z weighting, and Fast/Slow/Impulse response - Sleep noise analysis with baseline, peak, disturbances, and quiet periods - Hearing exposure estimates based on NIOSH and OSHA references - Noise profile insights for low-frequency rumble, traffic, mechanical noise, and sudden events - Local history with session summaries and event timelines - PDF reports for single sessions, 24-hour trends, and sleep review - Microphone profiles, calibration tools, and device model adjustment - Local-first data storage with no raw recording upload by default Free features include real-time measurement, basic trends, single-session reports, and recent history. Pro is a one-time purchase that unlocks advanced reports, sleep analysis, full history, calibration tools, alerts, and data archive features. NoiseScope is designed for personal reference, room comparison, sleep environment review, apartment noise checks, office noise tracking, and daily sound awareness. It is not a replacement for a certified legal sound level meter.

Screenshots

我爱PDF4 screens
Decibel Meter4 screens

Verdict

The call

The clearest difference is in-app purchases: 我爱PDF at none against Decibel Meter's 1. 我爱PDF also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Decibel Meter sells 1 one-off in-app purchase. 我爱PDF asks for nothing beyond the download.

UpkeepUpdate frequency

我爱PDF ships an update every 2 months, Decibel Meter every 5 weeks. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

Scorecard2 real differences · 4 level
我爱PDF versus Decibel Meter: the parameters behind the verdict, then further details
Parameter我爱PDFDecibel Meter
PriceFreeFree
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size68 MB3 MB
Age rating4+4+
DeveloperHainan Yidaosan Technology Co., Ltd.博 彭

In-app purchases

None

我爱PDF

No in-app purchases

1 purchases

Decibel Meter

One-time1
  • Pro永久版$1.99

Questions

Is 我爱PDF free?
我爱PDF is free to download, with no in-app purchases.
Is Decibel Meter free?
Decibel Meter is free to download, with in-app purchases available.
Do 我爱PDF or Decibel Meter have ads?
Neither 我爱PDF nor Decibel Meter shows ads.
Which is updated more often, 我爱PDF or Decibel Meter?
我爱PDF ships an update every 2 months, and Decibel Meter every 5 weeks. Most recently, 我爱PDF was updated on October 4, 2026 and Decibel Meter on October 8, 2026.

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