Comparison

zeroStudy vs SparkGlow

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

Head to head
About

zeroStudy

Features
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Turn the YouTube videos you already enjoy into a language-learning routine. zeroStudy brings interactive subtitles, vocabulary capture, and spaced repetition together, so watching, understanding, and remembering flow in one place. LEARN WITH YOUTUBE • Paste a YouTube link and watch without leaving zeroStudy. • Follow interactive subtitles as the video plays. • Select a word or phrase to understand and save it in context. • Continue recently watched videos and track your daily immersion progress. REMEMBER WITH REINFORCE • Review vocabulary with spaced repetition at the right time. • Use active recall to build durable memory. • Hear pronunciation and revisit the original sentence. • Add your own words and phrases manually, with optional AI Auto Fill. • Track your streak, retention, and learning progress. KEEP YOUR LEARNING CONNECTED Your vocabulary and progress stay synced across zeroStudy. The optional Chrome extension gives you another way to collect vocabulary while watching on desktop, but it is not required to use the iPhone app. Watch what you enjoy. Save what matters. Reinforce what you want to remember.

About

SparkGlow

Features
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最難的永遠是「開始」。 SparkGlow 是為學生打造的專注與計劃 App,內建一位讀得懂你數據的 AI 學習教練,螢火蟲。它不會丟一堆勵志話給你,它會看你這週真正完成了什麼、哪個時段最有效率,然後告訴你「現在先做這一件」。 【它幫你開始】 - 核心衝刺:每天挑出最該做的那一件,並附上理由(快到期、這科你最卡、現在剛好是你的高效時段)。 - 一句話拆任務:把「準備物理小考」變成今晚做得完的三個小步驟。 - AI 排計劃:說出你這週的目標,它排出分日、分時段的計劃,你勾選要哪些,一鍵加入。 - 改計劃也用說的:「明天太滿,往後挪兩件」,它直接幫你調整,不必整份重排。 【番茄鐘陪你做完】 - 專注計時,背景安全:切出去、鎖螢幕、接電話,回來時間都不會跑掉。 - 可綁定任務:專注結束直接問你完成了沒,還能順手記下這一輪的心情。 - 每一次專注都會累積成紀錄,也成為 AI 分析你的真實依據。 【看得見的進步】 - 連勝:當天任務全部完成,連勝就往上跳一格。 - AI 週報:讀你的真實數據產出回顧與圖表,指出哪一科在退步、哪個時段最有效率。 - 重要日期:期中考、報告死線倒數,一鍵讓 AI 生出準備任務。 【為你調整】 - 第一次開啟會問你幾個問題(你是誰、主要科目、目標、精力高峰),之後 AI 的每一句建議都以此為前提。 - AI 的語氣與說話方式你可以自己改寫,設定裡就能編輯。 - 介面以繁體中文為主,英文持續完善中。 【你的資料是你的】 - 任務、專注紀錄、反思與聊天都存在你的裝置上。 - 使用 AI 時,必要內容經加密連線傳送以取得回應;我們的伺服器原則上不儲存,僅抽樣保留一小部分用於改善品質,可在設定裡隨時關閉。 - 可一鍵匯出成檔案,也能徹底刪除。 - 沒有第三方追蹤 SDK,不做廣告或跨 App 追蹤。 需要 iOS 17.2 或以上。 【訂閱方案】 免費即可使用核心功能,每週都有 AI 額度。需要更多 AI 用量時再升級: - SparkGlow Pro(月繳/年繳):全功能解鎖,高每週 AI 額度。 - SparkGlow Max(月繳/年繳):全功能解鎖,最高每週 AI 額度與最多深度規劃次數。 兩個付費階層的功能完全相同,差別只在 AI 用量。 - 價格與訂閱期長以 App 內 App Store 顯示為準。 - 訂閱為自動續訂:若未於當期結束前 24 小時取消,將自動續期並扣款。 - 購買後可隨時在 iPhone 的「設定」,「Apple 帳號」,「訂閱項目」中管理或取消。 隱私權政策:https://sparkglows.com/trust/privacy 服務條款:https://sparkglows.com/trust/terms

Screenshots

zeroStudy3 screens
SparkGlow4 screens

Verdict

The call

The clearest difference is in-app purchases: zeroStudy at none against SparkGlow's 4. zeroStudy also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.2). On price, update cadence and ads 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

Both are free to download. SparkGlow sells 4 in-app purchases, starting at $2.99 per month. zeroStudy asks for nothing beyond the download.

UpkeepUpdate frequency

zeroStudy ships an update daily, SparkGlow every 2 days. The most recent releases landed on September 29, 2026 and September 26, 2026 respectively.

Scorecard3 real differences · 3 level
zeroStudy versus SparkGlow: the parameters behind the verdict, then further details
ParameterzeroStudySparkGlow
PriceFreeFree
Update frequencyDaily — betterEvery 2 days
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.1 — better17.2
Further details — not scored
Size32 MB29 MB
Age rating4+4+
DeveloperJIA JIUN KuYu Chen Huang

In-app purchases

None

zeroStudy

No in-app purchases

4 purchases

SparkGlow

Subscriptions4
  • SparkGlow Pro Monthly$2.991 Month
  • SparkGlow Max Monthly$4.991 Month
  • SparkGlow Pro Yearly$29.991 Year
Show 1 more
  • SparkGlow Max Yearly$39.991 Year

Questions

Is zeroStudy free?
zeroStudy is free to download, with no in-app purchases.
Is SparkGlow free?
SparkGlow is free to download, with in-app purchases available.
Do zeroStudy or SparkGlow have ads?
Neither zeroStudy nor SparkGlow shows ads.
Which is updated more often, zeroStudy or SparkGlow?
zeroStudy ships an update daily, and SparkGlow every 2 days. Most recently, zeroStudy was updated on September 29, 2026 and SparkGlow on September 26, 2026.

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