阁楼 vs LudyMeter

阁楼是一款助你保护隐私，管理自己设备上应用程序使用的App。 希望在做特定的事情的时候不被设备上一些应用程序打扰？例如，学习的时候不被聊天软件的信息所干扰？ 希望在将设备交给他人使用的时候，或在特定时间、地点时保护自己的隐私，让一些App不被他人发现？ 通过阁楼，你可以将想要排除干扰的应用程序或不想见到的应用程序放入应用程序组。 - 有阁楼的陪伴，你更好地保护隐私或提升效率。例如，在学习开始前，将所有的聊天软件放到阁楼，这样在学习时便不会受到聊天软件的干扰，也无法回复聊天软件，于是自然能专心学习了。 - 阁楼还提供强大的信息保护功能。你可以设置解锁阁楼App的全局密码、也可针对不同应用组分别设置取回应用组的密码与紧急密码。 - 不仅如此，阁楼也可以与快捷指令与Siri搭配使用。你可以将阁楼的快捷指令放到你的工作流程或自动化中，带来无限操作可能。要与Siri搭配使用，只需对Siri说“将应用程序组从阁楼取回”或“将应用程序组放到阁楼”即可。 - 与此同时，你还可以通过阁楼禁止应用的安装与卸载，保障绝对的安全。 阁楼，静谧之处由木板搭起的空中储物所，你的安全空间，你的超级好朋友 ：） 阁楼无法知道你选择的应用，并且不会主动发送任何数据至服务器，所以请尽管放心。 请注意，由于iOS系统限制，应用程序在从阁楼取回后在桌面的位置可能改变。

LudyMeter measures sound levels with professional accuracy — and does two things no other app can: track your noise exposure under EU workplace safety rules and detect musical notes from frequency peaks. No subscription. No ads. No data leaves your device. --- WHAT YOU GET FOR FREE --- The free tier is genuinely useful, not a teaser. You get a real-time A-weighted decibel meter with min, max, and average tracking. See how loud your environment is compared to everyday sounds ("As loud as a vacuum cleaner" or "Hearing damage risk after 2 hours"). Save your last 7 days of measurements and share beautiful sound level cards with friends. Works entirely offline. --- PRO ($14.99 one-time) --- Unlock the full frequency analyzer: real-time FFT spectrum, 1/1 and 1/3 octave band display, and musical note detection that translates raw frequencies into note names like A4, E3, or Bb2 — with cent deviation. Compare before and after with A/B measurement snapshots. View spectrograms and get EQ recommendations for your room. Export unlimited measurement history to CSV. Supports A, C, and Z frequency weighting plus Fast, Slow, and Impulse time constants. Perfect for musicians, sound engineers, and audio enthusiasts who want a professional spectrum analyzer without a professional price tag. --- SAFETY ($49.99 one-time) --- The first and only iOS app with EU Directive 2003/10/EC noise exposure tracking. Calculate LEX,8h (daily noise exposure normalized to 8 hours), track LCpeak, and monitor your dose percentage in real time. A three-zone warning system turns green, amber, or red at the EU action values of 80, 85, and 87 dB(A). Get haptic alerts when you cross a threshold. Run full-shift background monitoring without keeping the screen on. Generate PDF screening reports with timestamps, location, and exposure status for workplace documentation. Also includes NIOSH and OSHA dosimeter modes for US workplace standards. Note: LudyMeter is a screening and awareness tool. It does not replace certified Class 1 or Class 2 sound level meters required for legally binding workplace noise assessments. --- WHY LUDYMETER --- PRIVACY FIRST Zero data collection. Zero analytics. Zero server calls. Your microphone audio is processed entirely on your iPhone and never recorded or transmitted. Works in airplane mode. App Store privacy label: Data Not Collected. BUILT FOR iOS 26 Designed from scratch with Liquid Glass, Dynamic Island, Live Activity, and home screen widgets. Dark mode optimized. 60fps animations driven by real audio input. TRANSPARENT CALIBRATION Three-tier calibration system: automatic per-device offset profiles, user single-point calibration against a reference, and external measurement microphone support with .cal file loading. We tell you exactly how accurate your readings are. ONE-TIME PURCHASE We believe utility apps should not charge monthly rent. Pay once for Pro or Safety, use forever. Free updates included. --- TECHNICAL SPECIFICATIONS --- - Frequency weighting: A, C, Z (flat) - Time weighting: Fast (125ms), Slow (1s), Impulse (35ms rise / 1500ms decay) - FFT: 4096-point Hann window, 50% overlap, 20 Hz update rate - Octave bands: 1/1 (10 bands) and 1/3 (33 bands), IEC 61260-1 centers - Pitch detection: YIN algorithm, +/-0.5 cent accuracy - Audio engine: AVAudioEngine in .measurement mode (no AGC, no noise suppression) - EU thresholds: 80/85/87 dB(A) LEX,8h, 135/137/140 dB(C) LCpeak - US standards: NIOSH REL (85 dBA/8h, 3dB exchange), OSHA PEL (90 dBA/8h, 5dB exchange) - Minimum device: iPhone with iOS 17+ - Designed for: iOS 26 Liquid Glass From the makers of Ludy apps. Questions? ludy@ludy.app