Comparison

Decibel Meter vs iSecretWorld

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

Head to head
About

Decibel Meter

Measure ambient sound levels in real-time using your device's microphone. Understand your environment's noise status, save measurement sessions, and generate PDF reports with data and scene photos. Useful for everyday reference and record-keeping.

Highlights
  • Real-time decibel readings
  • Spectrum analysis
  • Environment status labels
  • Session statistics
  • Measurement history
  • Audio playback
  • Scene photo records
  • PDF reports
Features
Read full description

Decibel Meter turns your phone into a quick way to check how loud a place really is. Tap Start and you see the current sound level in dB with a live spectrum. End the session and the app keeps the average, peak and minimum values, the duration and the audio it recorded, so you can go back and compare later. WHAT YOU CAN DO • Live dB reading with a spectrum that reacts to the room • Save a session together with its audio and stats • Review every session in History and replay the recording • Generate a PDF report from a session, or attach one you already have • Take a scene photo with the time, place and reading printed on it • Calibrate the offset so readings sit closer to a reference meter • Compare a reading with familiar places: library, office, traffic, construction WHERE PEOPLE USE IT • Noise from renovation, machines or the road outside • Talking to a neighbour, a landlord or a building manager with something concrete • Checking whether a bedroom or study is quiet enough • Comparing two rooms, or the same room before and after a change EVERYTHING STAYS ON YOUR PHONE Recordings, reports and photos are saved on the device. The app does not upload them. PERMISSIONS • Microphone: needed to measure sound. Keep the app in the foreground while measuring. • Camera and location: used only when you take a scene photo with the reading on it. PLEASE NOTE Readings come from your phone's microphone, so they vary between devices and are affected by cases, dust and system audio processing. Calibration helps, but the numbers and reports are for reference and comparison only. They do not replace a calibrated sound level meter or a certified test report. Free with ads.

About

iSecretWorld

Features
Read full description

专业电商 BI 数据分析管理平台,覆盖渠道、商品、推广、监控四大核心模块,专为电商商家、运营管理者打造。专业电商 BI 数据分析管理平台,覆盖渠道、商品、推广、监控四大核心模块,专为电商商家、运营管理者打造。 渠道模块:全渠道流量、营收、占比多维分析,清晰看透各渠道投产效果 商品模块:单品销量、毛利、动销排行,智能挖掘爆款与滞销商品 推广模块:投放费用、转化率、引流效果复盘,助力精准投放降本增效 监控模块:经营数据实时刷新,异常数据预警,随时随地掌握店铺动态 极简可视化报表,数据清晰易懂,不用电脑、不用复杂表格,手机就能完成全链路电商经营分析,做数据驱动的智慧运营。

Screenshots

Decibel Meter4 screens
iSecretWorld4 screens

Verdict

The call

The clearest difference is price: iSecretWorld at Free against Decibel Meter's $0.99. iSecretWorld also leads on update cadence (daily vs every 3 months) and iOS requirement (13.0 vs 15.0). On ads, in-app purchases 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

iSecretWorld is free to download; Decibel Meter costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Decibel Meter ships an update every 3 months, iSecretWorld daily. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
Decibel Meter versus iSecretWorld: the parameters behind the verdict, then further details
ParameterDecibel MeteriSecretWorld
Price$0.99Free — better
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 3 monthsDaily — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size41 MB24 MB
Age rating4+4+
Developer恒盛 程建华 姚

In-app purchases

None

Decibel Meter

No in-app purchases

None

iSecretWorld

No in-app purchases

Questions

Is Decibel Meter free?
Decibel Meter costs $0.99, with no in-app purchases.
Is iSecretWorld free?
iSecretWorld is free to download, with no in-app purchases.
Do Decibel Meter or iSecretWorld have ads?
Neither Decibel Meter nor iSecretWorld shows ads.
Which is updated more often, Decibel Meter or iSecretWorld?
Decibel Meter ships an update every 3 months, and iSecretWorld daily. Most recently, Decibel Meter was updated on November 9, 2026 and iSecretWorld on October 31, 2026.

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