Comparison

Decibel Meter Plus vs AI Offline Translator

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

Head to head
About

Decibel Meter Plus

Measure ambient sound levels and understand their impact on hearing. This app provides real-time decibel readings, exposure time guidelines, and information on noise-induced hearing loss. It helps you identify loud environments and learn how to protect your hearing.

Highlights
  • Measure sound levels
  • Display average, peak, and max values
  • Plotted history of average values
  • Information on NIHL
  • Decibel exposure time guidelines
  • Calibrate measurements
  • Record and export data
Features
Read full description

Decibel Meter helps you quickly check the sound level around you using your device’s built-in microphone. Open the app and instantly see the current sound level in decibels. You can use it to get a general idea of everyday noise levels at home, in the office, in classrooms, outdoors, or in other environments. Key Features: • Real-time sound level measurement • Clear decibel display • Average, peak, and maximum values • Simple visual meter and history graph • Calibration adjustment for different devices and environments • Easy-to-use interface for quick checks • Support for iPhone and iPad • Multiple language support • In-app Support for feedback and questions Please note: Decibel readings may vary depending on your device microphone, case, distance from the sound source, background noise, and calibration settings. This app is designed for general reference and everyday use. It is not a replacement for a certified professional sound level meter. Download Decibel Meter and check the sound around you with ease.

About

AI Offline Translator

Translate documents, text, photos, and voice offline with a powerful on-device AI model. Enjoy privacy and convenience without an internet connection after initial setup. Offers free file translation and optional upgrades for longer text.

Highlights
  • Offline translation for 29 languages
  • Whole-file translation (PDF, DOCX, TXT)
  • Photo translation with OCR
  • Voice translation with text-to-speech
  • Long text translation up to 10,000 characters
  • PDF export with encryption
  • No internet required after setup
Features
Read full description

AI Offline Translator runs a real large language model on your device. No cloud, no account, no internet after setup. == Free, plus one optional one-time purchase == Free forever: whole-file translation — import and translate PDF, DOCX, TXT, MD and RTF documents at no cost — plus text translation in 29 languages (up to 1,000 characters per translation on the Translate screen), photo translation with OCR, voice translation, favorites, history and PDF export. Optional one-time in-app purchase ("Long Text Pro"): full translation of texts longer than 1,000 characters, up to 10,000 characters, on the dedicated Long Text page. Try before you buy — longer texts are translated free up to the first 1,000 characters, so you can judge the quality before unlocking. No subscription, and nothing else is locked. == Setup: one download, then offline forever == The app ships without a model. On first launch, download it once over Wi-Fi (main model about 1.1 GB, lightweight about 400 MB). After that everything runs offline, Airplane Mode included. The app checks your free storage space and warns you before downloading. == Why offline matters == - Your text never leaves the device: no server, no upload, no analytics SDK, no ads. - Works on a plane, in the subway, or abroad without roaming. - No account, no sign-in, no rate limits, no monthly fee. == Features == - 29 translation languages, any-to-any, source language detected automatically - Whole-file translation — PDF, DOCX, TXT, MD, RTF — completely free - Long Text page for texts up to 10,000 characters - Photo translation with on-device OCR - Voice translation (7 languages via Apple's on-device speech packs) with text-to-speech readback - PDF export with clean formatting, favorites, and history encrypted on device - Interface in 50 languages, follows your iOS system language - Native iOS design, light/dark/system, Dynamic Type and VoiceOver supported == Engine == Qwen2.5 1.5B running on llama.cpp with Metal GPU acceleration — fast, and close to cloud quality for everyday text. == Permissions == Camera, photo library and microphone are requested only when you use photo or voice translation. All processing happens locally. == Contact == Questions or suggestions: birdflyingtodie@gmail.com Privacy policy: https://sundamingbai.github.io/translator/privacy-policy.html

Screenshots

Decibel Meter Plus4 screens
AI Offline Translator4 screens

Verdict

The call

The clearest difference is review sentiment: AI Offline Translator at 100% against Decibel Meter Plus's 36%. AI Offline Translator also leads on price (Free vs $1.99) and update cadence (every 5 days vs every 6 weeks). Decibel Meter Plus's advantage is iOS requirement (15.8 vs 17.0). On ads, in-app purchases, monetization model 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

AI Offline Translator is free to download; Decibel Meter Plus costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Decibel Meter Plus ships an update every 6 weeks, AI Offline Translator every 5 days. Both last shipped on September 29, 2026.

Scorecard4 real differences · 6 level
Decibel Meter Plus versus AI Offline Translator: the parameters behind the verdict, then further details
ParameterDecibel Meter PlusAI Offline Translator
Price$1.99Free — better
Rating3.0 (125 ratings) — better—
Positive reviews35.7% of reviews100.0% of reviews — better
Number of ratings125 — better—
Update frequencyEvery 6 weeksEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.8 — better17.0
Further details — not scored
Size14 MB11 MB
Age rating4+4+
Developer华芳 张大明 孙

Customer experience

Decibel Meter Plus

All ratings125 ratings
Positive48.8%
Neutral9.6%
Negative41.6%
Written reviews126 reviews
Positive35.7%
Neutral8.7%
Negative55.6%

AI Offline Translator

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Decibel Meter Plus

Reported bugs

7 issues
  • App requires developer updates and iOS compatibility fixes
  • Baseline reading of 50-80 dB even in complete silence
  • Readings spike dramatically with minimal sound input
  • Graph display lacks user control
  • Inconsistent measurements in same environment
Show 2 more
  • Microphone sensitivity cannot be adjusted
  • App crashes or fails to function on some devices

Requested features

6 requests
  • Calibration function to adjust readings
  • Higher maximum dB limit (120+ dB) for loud events
  • Ability to attach photos with meter readings
  • Better baseline reset to 0 dB in silence
  • dB(A) weighting filter option
Show 1 more
  • Improved control over graphical display

AI Offline Translator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Decibel Meter Plus

No in-app purchases

None

AI Offline Translator

No in-app purchases

Questions

Is Decibel Meter Plus free?
Decibel Meter Plus costs $1.99, with no in-app purchases.
Is AI Offline Translator free?
AI Offline Translator is free to download, with no in-app purchases.
Do Decibel Meter Plus or AI Offline Translator have ads?
Neither Decibel Meter Plus nor AI Offline Translator shows ads.
Which is updated more often, Decibel Meter Plus or AI Offline Translator?
Decibel Meter Plus ships an update every 6 weeks, and AI Offline Translator every 5 days. Most recently, Decibel Meter Plus was updated on September 29, 2026 and AI Offline Translator on September 29, 2026.

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