Smart Case vs Plain|騒音を検知して環境音を自動再生
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Smart Case
Personalize your phone case with a dynamic e-ink display. Sync photos, text, QR codes, to-do lists, and weather directly to your case for easy access and improved efficiency.
- Sync photos and text
- Display QR codes
- Integrate to-do lists and calendars
- DIY dynamic views with custom fonts and colors
- E-ink screen image enhancement
- Import business cards
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Through the Smart Case "Smart Phone Case" app, you can sync your favorite photos, text, QR codes, to-do lists, calendars, and weather to the e-ink screen on your phone case and display them. It comes with many interesting and practical theme wallpapers: popular memes, touching copy, motivational quotes, work lists, cartoons, national style graphics and texts, and anime, everything you need is here. DIY Dynamic View: You can add your favorite images and text, and freely set the font, color, direction, and size to create a unique dynamic view for yourself. Using an e-ink screen image quality enhancement algorithm, four-color display, clearer details and edges, more natural gradients, presenting illustrations and portraits closer to the real effect. Convenient Code Display: It's very tedious to open various QR codes every day. You can transfer your frequently used QR codes to the e-ink screen on the phone case for display, and scan the code by showing the e-ink screen. WeChat QR code, payment code, service code can all be scanned. Improve Work and Life Efficiency: You can import to-do items, schedules, business cards, and other information to the e-ink screen to improve work and life efficiency.
Plain|騒音を検知して環境音を自動再生
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Plain は、周囲の音量を検知し、一定以上うるさくなったときだけ環境音を再生するアプリです。 乾燥機音や換気扇音のようなシンプルな音で、気になる生活音をやわらげ、作業や勉強に集中しやすい環境づくりをサポートします。 主な機能 ・騒音を検知して自動再生 ・DRY / VENT の2種類の音を選択可能 ・感度を3段階で調整可能 ・必要なときは手動再生にも対応 ・黒ベースの静かなミニマルUI Plain は必要なときだけ音で環境を整え、集中しやすい空気をつくることを目指しています。
Screenshots
Verdict
The clearest difference is iOS requirement: Smart Case at 14.0 against Plain|騒音を検知して環境音を自動再生's 26.2. On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.
| Parameter | Smart Case | Plain|騒音を検知して環境音を自動再生 |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 14.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 13 MB | 12 MB |
| Age rating | 9+ | 4+ |
| Developer | 波 宁 | KIICHI STUDIO |
In-app purchases
Smart Case
No in-app purchases
Plain|騒音を検知して環境音を自動再生
No in-app purchases
Questions
Is Smart Case free?
Is Plain|騒音を検知して環境音を自動再生 free?
Do Smart Case or Plain|騒音を検知して環境音を自動再生 have ads?
Which is updated more often, Smart Case or Plain|騒音を検知して環境音を自動再生?
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