Comparison

Air Ruler vs sound

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

Head to head
About

Air Ruler

Features
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Turn your iPhone into a real, precision ruler. No need for a physical ruler — your screen becomes a true mm/cm scale. Screen Ruler Mode Place your phone next to any object. The screen displays a real millimeter and centimeter scale. Perfect for: Small objects, parts, jewelry Paper, photos, cards Screen bezels, phone cases, printed materials Anything that requires a direct, physical scale Why Air Ruler? No physical ruler needed — your phone is all you need Pure screen ruler mode, no AR complexity Clean, simple, open-and-use interface Supports cm / inch switch Use Cases DIY & crafts: materials, fabric, model parts Office & study: book dimensions, on-screen image sizes Home & daily use: check length/width of small items Quick estimation: need to know how long something is? Just use your phone Air Ruler. Measure anywhere. — Privacy Policy please visit: https://docs.qq.com/doc/DREt1SXJkbG9JYUFT * **Terms of use (EULA): * https://docs.qq.com/doc/DREdKR2ZwYUJaa1hr * **Terms of apple please visit: * https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

sound

This app helps you focus and learn with a Pomodoro timer and white noise generator. Track your progress with detailed statistics and enjoy a seamless experience with dark mode and dynamic island support.

Highlights
  • Pomodoro focus mode
  • Customizable timer and sound alerts
  • White noise sound library
  • Focus time statistics
  • Home screen widgets
  • Dark mode and Dynamic Island support
Features
Read full description

sound-time 是一款专为高效工作与学习设计的轻量化 iOS 应用,集番茄钟、白噪音、数据统计与个性化小组件于一体。核心功能包括:1) 番茄专注模式:支持自定义时长,搭配生动计时器与音效提醒,助你高效完成任务;2) 白噪音库:精选优质自然音源(如雨声、流水、风声等),模拟真实环境音,屏蔽干扰,营造沉浸式氛围;3) 数据统计:通过精美图表记录专注时长与完成轮次,直观掌握时间管理成果;4) 灵动小组件:随时查看专注状态与音源选择,操作便捷;5) 深色模式与灵动岛适配:完美契合苹果原生设计,保护眼睛的同时提升视觉体验。

Screenshots

Air Ruler3 screens
sound4 screens

Verdict

The call

The clearest difference is price: sound at Free against Air Ruler's $0.99. sound also leads on in-app purchases (none vs 3). Air Ruler's advantage is iOS requirement (17.6 vs 26.2). On 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

sound is free to download; Air Ruler costs $0.99 up front. Air Ruler sells 3 in-app purchases, starting at $2.99 per month. sound asks for nothing beyond the download.

Scorecard3 real differences · 5 level
Air Ruler versus sound: the parameters behind the verdict, then further details
ParameterAir Rulersound
Price$0.99Free — better
Positive reviews—100.0% of reviews
Update frequency—Every 4 months
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.6 — better26.2
Further details — not scored
Size7 MB135 MB
Age rating4+4+
Developer乐祥 胡祖浪 吴

In-app purchases

3 purchases

Air Ruler

Subscriptions2
  • Ruler Premium - 30days$2.991 Month
  • Ruler premium - yearly$8.991 Year
One-time1
  • Ruler Premium - lifetime$29.99
None

sound

No in-app purchases

Questions

Is Air Ruler free?
Air Ruler costs $0.99, and also offers in-app purchases.
Is sound free?
sound is free to download, with no in-app purchases.
Do Air Ruler or sound have ads?
Neither Air Ruler nor sound shows ads.

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