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.
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.
- 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
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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.
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.
- 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
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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
Verdict
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
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.
Decibel Meter Plus ships an update every 6 weeks, AI Offline Translator every 5 days. Both last shipped on September 29, 2026.
| Parameter | Decibel Meter Plus | AI Offline Translator |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 3.0 (125 ratings) — better | — |
| Positive reviews | 35.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 125 — better | — |
| Update frequency | Every 6 weeks | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.8 — better | 17.0 |
| Further details — not scored | ||
| Size | 14 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | 华芳 张 | 大明 孙 |
Customer experience
Decibel Meter Plus
AI Offline Translator
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
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- 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
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- Improved control over graphical display
AI Offline Translator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Decibel Meter Plus
No in-app purchases
AI Offline Translator
No in-app purchases
Questions
Is Decibel Meter Plus free?
Is AI Offline Translator free?
Do Decibel Meter Plus or AI Offline Translator have ads?
Which is updated more often, Decibel Meter Plus or AI Offline Translator?
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