Comparison

KeepSim vs BaxSim

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

Head to head
About

KeepSim

Read full description

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.

About

BaxSim

Features
Read full description

BaxSim gives you instant mobile data for travel—without physical SIM cards, roaming stress, or surprise charges. Install your eSIM in minutes, choose a data plan for your destination, and stay connected from the moment you land. Whether you’re traveling for business, exploring new cities, or crossing multiple countries, BaxSim keeps you online for maps, rides, bookings, messaging, and work. WHY BAXSIM - Instant eSIM setup in a few taps - Local, regional, and global data plans - Fast top-ups when you need more data - Real-time usage tracking and plan management - Secure checkout and simple account controls - In-app support when you need help HOW IT WORKS 1. Choose your destination and plan 2. Install your eSIM instantly 3. Activate before your trip to connect automatically when you arrive. Stay connected and top up anytime Skip SIM swaps and avoid expensive roaming charges. BaxSim makes travel connectivity simple, fast, and reliable. Download BaxSim and travel connected with confidence.

Screenshots

KeepSim4 screens
BaxSim4 screens

Verdict

The call

The clearest difference is in-app purchases: BaxSim at none against KeepSim's 1. BaxSim also leads on update cadence (weekly vs every 3 weeks) and device support (3 vs 1). On price 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. KeepSim sells 1 one-off in-app purchase. BaxSim asks for nothing beyond the download.

UpkeepUpdate frequency

KeepSim ships an update every 3 weeks, BaxSim weekly. The most recent releases landed on October 7, 2026 and October 4, 2026 respectively.

Scorecard4 real differences · 2 level
KeepSim versus BaxSim: the parameters behind the verdict, then further details
ParameterKeepSimBaxSim
PriceFreeFree
Update frequencyEvery 3 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size62 MB86 MB
Age rating4+4+
Developer洋 闵BAXPAY

In-app purchases

1 purchases

KeepSim

One-time1
  • KeepSim Pro$4.99
None

BaxSim

No in-app purchases

Questions

Is KeepSim free?
KeepSim is free to download, with in-app purchases available.
Is BaxSim free?
BaxSim is free to download, with no in-app purchases.
Do KeepSim or BaxSim have ads?
Neither KeepSim nor BaxSim shows ads.
Which is updated more often, KeepSim or BaxSim?
KeepSim ships an update every 3 weeks, and BaxSim weekly. Most recently, KeepSim was updated on October 7, 2026 and BaxSim on October 4, 2026.

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