Comparison

GainLens vs DueCat

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

Head to head
About

GainLens

Features
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GainLens 是為投資人打造的本機優先投資組合追蹤工具。自行輸入交易,即可集中查看台股、美股、加密貨幣、基金、現金、融資部位,以及台灣指數期貨與選擇權。 主要功能: • 記錄買進、賣出、拆股、入金與出金 • 查看平均成本、淨成本、已實現與未實現損益 • 追蹤今日、本月與今年的投資績效 • 透過績效曲線與資產配置掌握投資組合 • 建立無上限的定期投資計畫 • 支援資料備份、還原與匯出 • 自訂交易費用、證交稅與匯率設定 方案內容: • Free:支援台股、美股與加密貨幣,最多 5 個有效標的,使用各市場每日收盤資料 • Plus:增加基金、無上限有效標的與隨時手動更新 • Pro:再增加權證、融資、期貨與選擇權功能 GainLens 採本機優先設計。交易紀錄、持倉數量、成本及投資組合資料儲存在你的裝置上。行情查詢只會傳送市場、商品代號或基金代碼等必要欄位。 GainLens 不連結券商帳戶、不代為下單,也不提供投資建議。 使用條款(Apple 標準 EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

DueCat

This app helps you manage your recurring bills and subscriptions by providing a clear overview of upcoming payments. Understand your spending habits with visual dashboards and get timely reminders to avoid missed renewals.

Highlights
  • Subscription and bill tracking
  • Upcoming payment dashboard
  • Monthly budget setting
  • Spending trend analysis
  • Renewal reminders
  • Custom organization
  • iCloud sync
Features
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Know what’s due before it’s charged. DueCat brings subscriptions and one-time bills together in a calm, visual dashboard. See upcoming payments at a glance, browse charges by date, and understand where your money is going. STAY AHEAD OF EVERY PAYMENT • Set a monthly budget and see what’s spent, still due, and remaining after this month’s bills • Track recurring subscriptions and one-time bills • View upcoming charges on a monthly calendar • See monthly averages, due totals, and payment dates • Pause or cancel tracking while keeping your records UNDERSTAND YOUR SPENDING • Review scheduled spending by month and year • Explore trends and category breakdowns • Identify subscriptions worth reviewing • Watch price changes get logged automatically the moment they happen. MAKE DUECAT YOURS • Organise subscriptions with lists and categories • Choose from a collection of built-in backgrounds • Add custom background photos with DueCat Pro • Keep your data in sync with iCloud NEVER MISS A RENEWAL • Set renewal reminders • Choose your preferred reminder time • Check upcoming payments from Home Screen widgets Start free with up to five subscriptions and iCloud sync. Unlock DueCat Pro with a one-time lifetime purchase for unlimited subscriptions, analytics, reminders, custom organisation, custom backgrounds, and widgets. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula

Screenshots

GainLens4 screens
DueCat4 screens

Verdict

The call

The clearest difference is in-app purchases: GainLens at none against DueCat's 1. GainLens also leads on iOS requirement (16.4 vs 26.6). DueCat's advantage is update cadence (every 5 days vs fortnightly). On price, ads 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

Both are free to download. DueCat sells 1 one-off in-app purchase. GainLens asks for nothing beyond the download.

UpkeepUpdate frequency

GainLens ships an update fortnightly, DueCat every 5 days. The most recent releases landed on November 5, 2026 and November 7, 2026 respectively.

Scorecard3 real differences · 7 level
GainLens versus DueCat: the parameters behind the verdict, then further details
ParameterGainLensDueCat
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—4 — better
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Freemium
DevicesiPhoneiPhone
Requires iOS16.4 — better26.6
Further details — not scored
Size35 MB77 MB
Age rating4+4+
DeveloperPo Jen KoOoi Way Min

In-app purchases

None

GainLens

No in-app purchases

1 purchases

DueCat

One-time1
  • DueCat Pro - Lifetime$7.99

Questions

Is GainLens free?
GainLens is free to download, with no in-app purchases.
Is DueCat free?
DueCat is free to download, with in-app purchases available.
Do GainLens or DueCat have ads?
Neither GainLens nor DueCat shows ads.
Which is updated more often, GainLens or DueCat?
GainLens ships an update fortnightly, and DueCat every 5 days. Most recently, GainLens was updated on November 5, 2026 and DueCat on November 7, 2026.

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