Swipner (刷刷 vs KeepSim
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Swipner (刷刷
Easily convert foreign currency amounts when traveling abroad or shopping on international websites. Get real-time exchange rates and calculate potential cash back and foreign transaction fees. Receive recommendations for the best credit card networks to use for your purchases.
- Real-time international exchange rates
- Cashback and foreign transaction fee calculation
- Credit card network recommendations
- Simple and intuitive interface
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Swipner (刷刷) 終於在 app store 與大家見面囉! 海外旅遊刷卡消費或在國外網站購物總是不知道外幣會如何換算, 導致刷卡時心裡多少有些疑惑, 不知道您是否有這樣相同的經驗? Swipner提供流暢簡潔的介面, 協助您在刷卡消費時快速換算參考金額, 同時也會推薦適合使用的國際組織 ( VISA / MasterCard / JCB ), 讓您外幣刷卡消費時不再充滿疑惑。 功能特色: - 即時取得各國國際組織匯率資訊 - 快速計算現金回饋海外手續費 - 根據計算結果推薦卡別
KeepSim
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KeepSim helps you keep every important SIM, eSIM, and virtual phone number alive — a local-first tracker for numbers you can't afford to lose. Some numbers matter long after you stop using them daily — a 2FA SIM, a prepaid travel line, a backup work number, a virtual line you can't lose. Miss the keep-alive window once and reactivation becomes a multi-step headache. KeepSim puts every number in one panel so you see what needs attention before it's gone. HOW KEEPSIM HELPS YOU KEEP EVERY SIM ALIVE > One-tap actions you set up once Pre-configure SMS, call, or web actions per number. When a renewal window opens, launch from detail or a widget — iOS confirms before anything sends. > Home Screen + Lock Screen widgets, every size Home Screen small / medium / large, plus Lock Screen rectangular / circular / inline. Top-N at-risk numbers visible at a glance; tap to jump straight to that number — no "open the app first" step. Widgets refresh after every keep-alive. > The app icon itself changes (Pro) 5 dynamic app icon styles (Poker, Calendar, Solari, LCD, Classic SIM). The KeepSim icon on your Home Screen — not a widget — shows days left for your most urgent number. Glance and you know whether to act. > Mark a keep-alive complete in one tap After the SMS sends or the call ends, mark it done. KeepSim recalculates the next due date and refreshes widgets and app icon. > Masked display across every surface Numbers display partially masked across the list, detail, and widgets. Check status in public without exposing the full number. > Local-first, no number reselling, no auto-messaging Your data lives on your device, or in your own private iCloud account if you enable Pro sync. Every communication action goes through iOS so you confirm before sending. KeepSim never auto-sends SMS or auto-dials. BUILT FOR MULTI-NUMBER USERS • Track every SIM, eSIM, prepaid line, and virtual number in one panel • Set keep-alive cycles, due dates, and reminder timing • Sort by risk — the most urgent number is always on top • Interface in English, Chinese, Japanese, Korean, and more; light and dark mode WHAT YOU GET FREE Download and use, no sign-up, no contact list access: • Up to 2 numbers • Default Kairo SIM Objects theme (light / dark / Dynamic Type) • Reminder 3 days before due • 1 basic action per number (SMS / call / web) • All Home Screen + Lock Screen widget sizes • Masked display and local storage KEEPSIM PRO — ONE-TIME UNLOCK If you manage more than a couple of numbers, Pro covers the real workload: • Unlimited numbers — track as many as you carry • Multi-stage reminders — 7 days, 3 days, and 1 day before due • All themes — Mission Timer Cards, Aero Operations Ledger, Telecom Command Console, and more, syncing across app and widgets • 5 dynamic app icons — Poker, Calendar, Solari, LCD, Classic SIM. The KeepSim icon shows days left for your most urgent number, refreshing after each keep-alive • iCloud sync — keep your numbers consistent across iPhones and iPads via your own iCloud; KeepSim's servers never see your data One-time purchase. Restore Purchases works on new devices. No subscription, no auto-renewal. WHAT KEEPSIM DOESN'T DO Clear boundaries, no surprises: • We don't sell or trade phone numbers • We don't provide carrier service or manage your carrier account • We don't auto-send SMS or auto-dial — every action requires your confirmation through iOS • We don't upload your numbers to our servers; data lives on your device or your private iCloud • We don't track you, we don't include ad SDKs, we don't read your contacts WHO KEEPSIM IS FOR • Students abroad and people working across borders • People holding on to a home-country SIM, a travel eSIM, or a prepaid line they can't afford to lose • Multi-line workers juggling work, backup, and virtual numbers • Anyone with a 2FA-only number that must stay alive Keep every number alive before it slips off your radar.
Screenshots
Verdict
The clearest difference is in-app purchases: Swipner (刷刷 at none against KeepSim's 1. Swipner (刷刷 also leads on iOS requirement (13.0 vs 17.0). KeepSim's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On price 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. KeepSim sells 1 one-off in-app purchase. Swipner (刷刷 asks for nothing beyond the download.
Swipner (刷刷 ships an update every 4 months, KeepSim every 3 weeks. The most recent releases landed on October 8, 2026 and October 7, 2026 respectively.
| Parameter | Swipner (刷刷 | KeepSim |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 60.6% of reviews | — |
| Update frequency | Every 4 months | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 28 MB | 62 MB |
| Age rating | 4+ | 4+ |
| Developer | XING YU SU | 洋 闵 |
In-app purchases
Swipner (刷刷
No in-app purchases
KeepSim
- KeepSim Pro$4.99









