LayMatic vs TwinPDFViewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LayMatic
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LayMatic lets you adjust the factory air suspension of compatible Mercedes-Benz vehicles—right from your iPhone. Set the perfect stance for daily driving, photo shoots, or track days, then restore stock height anytime. No permanent wiring or coding: plug in, adjust, unplug. Requires the LayMatic OBD-II dongle (sold separately). What you can do Lower in seconds: Easy Mode adjusts all four corners; Front/Back controls axles; Manual enables per-wheel fine-tuning. Save & restore: Your vehicle’s original values are backed up on first connect so you can return to stock anytime. Multiple vehicles: One Key licenses one car; add additional Keys to enable more cars in your garage. Non-invasive setup: No cutting, no “lowering links,” and no permanent wiring. How it works Create an account and sign in. Plug the LayMatic OBD-II dongle into the OBD port (under the steering wheel on most Mercedes-Benz models). Open the app and connect; on first connection you’ll assign a Key to the vehicle. Adjust height using Easy, Front/Back, or Manual modes. Unplug the dongle when you’re done. Compatibility Works with most Mercedes-Benz models equipped with factory air suspension (e.g., AIRMATIC, Air Body Control). Not compatible with hydraulic systems such as Active Body Control (ABC)/Magic Body Control. For the latest list of supported models, see our compatibility page on the LayMatic website. Safety & legal Use only when parked on a level surface with the parking brake engaged. Do not operate while driving. Ensure any changes comply with your local laws and inspection requirements (e.g., TÜV). Adjustments are reversible, but may affect warranty or assistance; use at your own risk. Requirements LayMatic OBD-II dongle (sold separately) and an active LayMatic account. A compatible Mercedes-Benz vehicle (see compatibility on our website). Bluetooth and internet access for initial setup and updates. Trademarks Mercedes-Benz, AIRMATIC, and related marks are trademarks of their respective owners. LayMatic is an independent product and is not affiliated with or endorsed by Mercedes-Benz.
TwinPDFViewer
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2つのPDFファイルを事前に選択し、中央タップで瞬時に切り替えて表示できるPDFビューアアプリです。文書の比較や検討に最適な機能を搭載しています。 主な機能 ◆デュアルPDF切り替え ・Front PDFとBack PDFを事前に選択・登録 ・中央タップで瞬時にPDFを切り替え ・デバイス内のファイルまたはフォルダから選択可能 ◆直感的な操作 ・スワイプでページ送り ・ピンチでズーム操作 ・タップでコントロール表示/非表示 ◆柔軟な表示モード ・単ページ表示 ・見開き表示(奇数・偶数ページ対応) ◆章移動機能 ・フォルダ内のPDFファイル間をChapterとして移動 ・前の章・次の章への簡単なナビゲーション <用途例> ・文書の比較・検討 ・資料の照合・確認 ・学習用教材の並行表示 ・契約書や仕様書の比較 ・翻訳作業での原文・訳文の切り替え確認 TwinPDFViewerは、2つのPDF文書を効率的に比較・検討したいすべてのユーザーに最適なソリューションです。ビジネス文書の比較から学習用途まで、様々なシーンで活用できるPDFビューアをお試しください。
Screenshots
Verdict
The clearest difference is ads: TwinPDFViewer at none against LayMatic's shown. LayMatic's advantage is update cadence (every 4 weeks vs every 14 months) and iOS requirement (12 vs 18.2). On price, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
LayMatic ships an update every 4 weeks, TwinPDFViewer every 14 months. Both last shipped on October 30, 2026.
| Parameter | LayMatic | TwinPDFViewer |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 weeks — better | Every 14 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12 — better | 18.2 |
| Further details — not scored | ||
| Size | 38 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Irsadi Soganci | Daichi Hayashi |
In-app purchases
LayMatic
No in-app purchases
TwinPDFViewer
No in-app purchases









