XLPostcards vs OpenSim
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
XLPostcards
Send personalized real postcards with your photos and messages directly from your phone. Choose XL or regular size for the same low price. AI assistance is available for crafting your message, and addresses are validated for fast delivery.
- Personalized photo postcards
- XL or regular size for $1.99
- AI message assistance
- Address book with birthday reminders
- Smart address validation
- Optional return address
- Mailed within a week
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Big Card. Bigger Smile. Send a real postcard from your phone in about two minutes. Pick a photo, write a message, and we print it, stamp it, and mail it. The XL 6"x9" card costs no more than a standard 4"x6" — twice the room for your photo and your words, same price. $2.99 a card, or as low as $1.87 in a credit pack. No subscription, no upsells, and credits never expire. Birthdays, holidays, thank-yous, or just saying hello. A real card in a real mailbox beats another notification. Also included: multi-photo layouts, occasion banners, AI help with the words, a saved address book with birthdays, group sends, and delivery to 20+ countries. XLPostcards: Big Card. Bigger Smile.
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
Screenshots
Verdict
The clearest difference is device support: XLPostcards at 3 against OpenSim's 1. On price, update cadence, ads and in-app purchases 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.
XLPostcards ships an update every 2 weeks, OpenSim fortnightly. Both last shipped on October 16, 2026.
| Parameter | XLPostcards | OpenSim |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 weeks — better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 15.1 — better | 16.0 |
| Further details — not scored | ||
| Size | 52 MB | 87 MB |
| Age rating | 4+ | 17+ |
| Developer | Patrick John Freeburger | ROAMINGESIM LDA |
In-app purchases
XLPostcards
No in-app purchases
OpenSim
No in-app purchases
