Comparison

PlainLock vs Jo一個T9

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

Head to head
About

PlainLock

Features
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PlainLock is a deliberately simple screen-time self-control tool. TWO WAYS TO SET A LIMIT • Schedule blocks: choose days and times, then the selected apps are blocked. • Daily limits: after the minutes you set are used, the apps stay blocked until tomorrow. • Shared group limits: put distracting apps in one group so switching apps cannot bypass the limit. • Group app limit: each group supports up to 50 apps, with a clear message when the limit is exceeded. • Cooling-off period: when you really need temporary access, wait 5 seconds, then unlock for the short duration you chose. LANGUAGES • Available in Traditional Chinese, English, Japanese, and Spanish. READ BEFORE YOU BUY • One purchase. No subscription. No in-app purchases. • Every rule stays on your device. The app makes no network requests and collects no app data. • This is a self-control tool, not a security tool. You can always remove restrictions by disabling its Screen Time permission in Settings. • Applying or clearing a block depends on iOS scheduling and can take one to two minutes. • Requires iOS 17.0 or later. Only iOS versions tested at release are supported; future compatibility and continuing updates are not guaranteed.

About

Jo一個T9

Features
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Jo一個T9注音:把注音放進九個鍵,單手也能快速打中文。 懷念傳統手機的九宮格打字嗎?Jo一個T9注音把 37 個注音符號分配到九宮格上,不用精準點到小小的按鍵,按大格子就能打字,特別適合單手操作、手指比較粗,或是家中長輩使用。 【主要特色】 ● 長句一次打到位 連續輸入多個字的注音,鍵盤會自動斷詞組句。聲調鍵讓選字更精準。 ● 候選字一鍵展開 點 ▼ 展開完整候選清單,多字詞也會完整顯示,不會被截斷。 ● 長按原地左右滑 長按注音鍵,手指在原地左右滑,就能指定要打的那一個注音;長按「。」選標點,長按聲調鍵換聲調。 ● 打錯也找得到 「臨近鍵容錯」會把按到旁邊的鍵、少按一個鍵的情況一起列入候選(可在設定中關閉)。 ● 越用越懂你 常選的字詞會自動排到前面,並根據上一個詞建議下一個詞。學習紀錄只存在你的裝置上,可匯出備份或用 iCloud 同步。 ● 可接自己的 AI 聯想(選用) 支援 OpenAI 相容 API,填入你自己的 API Key,選字後就會出現 AI 建議的下一句。預設關閉,資料直接從你的手機送到你選的服務。 ● 英文、數字、符號、表情符號 空格鍵長按切換英文鍵盤,123 鍵切換數字符號,長按 123 打表情符號。 【完全免費・重視隱私】 沒有廣告、沒有內購、沒有帳號。開發者不收集任何資料,你打的字不會傳給我們。 【啟用方式】 1. 打開「設定 → 一般 → 鍵盤 → 鍵盤」 2. 新增鍵盤,選擇「Jo一個T9注音」 3. 點進該鍵盤,開啟「允許完整取用」(用於共用學習紀錄;選用的 AI 聯想與 iCloud 備份也需要) 4. 在任何 App 中切換到此鍵盤開始使用 詞庫採用 libchewing(新酷音)開源詞庫。

Screenshots

PlainLock4 screens
Jo一個T94 screens

Verdict

The call

The clearest difference is price: Jo一個T9 at Free against PlainLock's $2.99. On update cadence, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Jo一個T9 is free to download; PlainLock costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PlainLock ships an update every 5 days, Jo一個T9 every 3 days. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.

Scorecard1 real difference · 5 level
PlainLock versus Jo一個T9: the parameters behind the verdict, then further details
ParameterPlainLockJo一個T9
Price$2.99Free — better
Update frequencyEvery 5 daysEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhoneiPhone
Requires iOS17.017.0
Further details — not scored
Size3 MB17 MB
Age rating4+4+
DeveloperChang Jhih YehYEN YU LIN

In-app purchases

None

PlainLock

No in-app purchases

None

Jo一個T9

No in-app purchases

Questions

Is PlainLock free?
PlainLock costs $2.99, with no in-app purchases.
Is Jo一個T9 free?
Jo一個T9 is free to download, with no in-app purchases.
Do PlainLock or Jo一個T9 have ads?
Neither PlainLock nor Jo一個T9 shows ads.
Which is updated more often, PlainLock or Jo一個T9?
PlainLock ships an update every 5 days, and Jo一個T9 every 3 days. Most recently, PlainLock was updated on October 2, 2026 and Jo一個T9 on October 11, 2026.

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