OpenSim vs Blue eSIM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OpenSim
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Buy prepaid mobile data for your next trip with OpenSim. Choose from our country and regional travel eSIM plans, purchase in the app, and manage your eSIM and data in one place. OpenSim was previously known as Roaming eSIM. CHOOSE DATA FOR YOUR TRIP • Buy country and regional eSIM data plans. • Choose a data allowance and validity to suit your trip. • View your purchased eSIMs and follow the installation instructions. • Manage your data and top up plans where supported. GET STARTED 1. Check that your device supports eSIM and is carrier-unlocked. 2. Choose a plan for your destination and travel dates. 3. Review its coverage, included services and activation rules before payment. 4. Follow the plan's installation instructions while you have an internet connection. 5. Select your travel eSIM for mobile data and follow the connection guidance for your destination. KNOW BEFORE YOU TRAVEL Activation rules vary by plan. Depending on the plan, validity may begin at purchase, installation or the first connection to a supported network. Check the activation terms before you buy or install. Top-ups are available only for supported plans. Coverage, network availability and speeds depend on the destination, plan and device. If you keep your home SIM active, your home carrier may still charge for calls, texts or data. Check your phone's SIM and roaming settings before you travel. Use your travel data for maps, messaging, internet calls, transport apps and other online services. NEED HELP? Find support in the app or visit https://www.getopensim.com/esim/support. Website: https://www.getopensim.com Privacy policy: https://www.getopensim.com/privacy-policy Terms: https://www.getopensim.com/terms-and-conditions
Blue eSIM
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Blue eSIM is the smartest way to stay connected worldwide. Skip the expensive roaming fees and the hassle of physical SIM cards. With Blue eSIM, you get instant, premium mobile data in over 150 countries at a fraction of the cost. Whether you are touching down in Tokyo, traveling across Europe, or exploring South America, Blue eSIM provides an effortless, premium travel experience. No hidden fees, just reliable internet the moment you land.
Screenshots
Verdict
The clearest difference is update cadence: Blue eSIM at every 4 days against OpenSim's fortnightly. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
OpenSim ships an update fortnightly, Blue eSIM every 4 days. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.
| Parameter | OpenSim | Blue eSIM |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 16.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 87 MB | 66 MB |
| Age rating | 17+ | 4+ |
| Developer | ROAMINGESIM LDA | Blue Innovations L.L.C. |
In-app purchases
OpenSim
No in-app purchases
Blue eSIM
No in-app purchases
