01

Writing & zoom

Write with Apple Pencil or your finger. Stroke thickness and smoothing adjust to the current zoom level. To modify content, use the 1-hour eraser or the Move tool.

02

Wind sound & haptics

Adjust wind volume from the Wind menu and choose whether it continues playing in the background. Haptics respond only while the app is in the foreground on iPhones that support Core Haptics; iPad and background states do not provide haptic feedback.

03

Text & focus

Select the Text tool and tap the canvas, then use − / + to adjust the default text size. Double-tap faded content to bring it to the center and increase clarity; double-tap again or begin another action to return it to its original position.

04

iCloud backup & Lifetime

Handwriting, text, wind sound, haptics, lighting, and every canvas, editing, and export tool are free. The Free plan can create up to three Spaces, and iCloud backup remains free when iCloud is available on the device. In Hong Kong, Lifetime is currently a one-time HK$228 purchase that unlocks unlimited Spaces, Google Drive backup, iCloud + Google Drive cross-provider merge/recovery, and two one-time App Store discount invitations. When Lifetime and both providers are active, Asympta reads both services, merges the latest content, then writes the same archive back to both. The invitations are shown as 10% and 20%; the App Store displays the actual local price and eligibility when redeemed. If Apple is still processing an invitation-code batch, Asympta preserves the verified claim for that slot and asks you to try again later; the slot is not lost. Before deleting the app, confirm that the backup services you use show a completed backup.

01

書寫與縮放

可使用 Apple Pencil 或手指書寫。筆畫的粗幼與平滑度會按目前縮放比例調整；如要修改內容，可使用一小時橡皮擦或移動工具。

02

風聲與觸感

在風聲選單調整音量，並可選擇讓風聲在背景繼續播放。觸感只會在支援 Core Haptics 的 iPhone 前景中回應；iPad 及背景狀態不會提供觸感。

03

文字與聚焦

選擇文字工具後點擊紙面，以 −／＋ 調整預設字體大小。雙擊已淡入的內容可移到中央並提高清晰度；再次雙擊或開始其他操作便會返回原位。

04

免費 iCloud 備份與 Lifetime

筆跡、文字、風聲、觸感、光照，以及全部畫布、編輯與匯出工具均免費。免費方案最多可建立 3 個 Spaces；裝置可使用 iCloud 時，iCloud 備份亦維持免費。在香港，Lifetime 現時一次性價格為 HK$228，會解鎖無限 Spaces、Google Drive 備份、iCloud + Google Drive 雙端合併／故障復原，以及兩個一次性 App Store 折扣邀請。Lifetime 已啟用且兩個 provider 都可用時，Asympta 會先讀取兩邊、合併最新內容，再把同一份封存檔寫回兩個服務。邀請介面標示 10% 及 20% 折扣；兌換時由 App Store 顯示適用地區的實際當地價格及資格。如 Apple 仍在處理邀請碼批次，Asympta 會保留該名額已驗證的領取要求並提示稍後重試，名額不會因此失效。刪除 App 前請先確認你正在使用的備份服務顯示已備份。