Comparison

Postfun vs Open To

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

Head to head
About

Postfun

Connect with people globally by exchanging real paper postcards. Discover new friends, collect unique cards and stamps, and share a piece of your world. The more you send, the more you receive.

Highlights
  • Send and receive real postcards
  • Connect with international users
  • Collect cards and stamps
  • Discover new cultures
  • Global postcard community
Features
Read full description

Discover the joy of real postcard exchange! With Postfun, you can send and receive real paper postcards from people all around the world. Find new friends, collect beautiful cards and stamps, and share a piece of your world with others. --- HOW IT WORKS 1. Request an address and a unique Postcard ID in the app. 2. Write and send a real postcard to the address you received. 3. When your postcard arrives, another Postfun user will send one back to you! 4. Register the Postcard ID when you receive a card and thank the sender. 5. Keep sending and receiving postcards — the more you send, the more you get! --- WHY YOU’LL LOVE POSTFUN • Exchange real postcards — not digital ones • Connect with people from different countries • Discover new cultures and languages • Collect cards and unique stamps • Enjoy a relaxing, creative hobby loved by millions --- Join the global postcard community and make someone’s day with a card! Start your postcard journey today — with Postfun! --- SUBSCRIPTION PRICING AND TERMS Postfun offers two auto-renewing subscription options: $2.99 per month $24.99 per year These prices are for United States customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence. The subscription will automatically renew unless turned off in your Apple Account Settings at least 24 hours before current period ends. You can go to your Apple Account settings to manage your subscription and turn off auto-renew. Your Apple Account will be charged when the purchase is confirmed. Read the terms and conditions here - https://ostasoft.com/postfun/terms Read the privacy policy here - https://ostasoft.com/postfun/policy

About

Open To

Easily discover when your friends and family are available for activities. Share your own availability with specific contacts or everyone at once, eliminating the need to constantly ask around. Perfect for spontaneous plans or last-minute get-togethers.

Highlights
  • See friend and family availability
  • Share custom availability
  • Target specific contacts
  • Post to all contacts
  • Spontaneous activity planning
  • Last-minute plans
Read full description

Open To makes it easy to see when, what and where your friends & family are open to doing something. When posting an availability, you choose specifically which contact sees your activity, or it can be shown to everyone at once. Now you have an idea who is available when, without having to ask around every time. It's also great for wanting to do something last minute when you have nothing planned.

Screenshots

Postfun4 screens
Open To3 screens

Verdict

The call

The clearest difference is in-app purchases: Open To at none against Postfun's 2. Open To also leads on ads (none vs shown) and review sentiment (100% vs 70%). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Postfun sells 2 in-app purchases, starting at $2.99 per month. Open To asks for nothing beyond the download.

UpkeepUpdate frequency

Postfun ships an update every 6 weeks, Open To every 8 days. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.

Scorecard6 real differences · 4 level
Postfun versus Open To: the parameters behind the verdict, then further details
ParameterPostfunOpen To
PriceFreeFree
Rating4.4 (61 ratings) — better—
Positive reviews70.3% of reviews100.0% of reviews — better
Number of ratings61 — better—
Update frequencyEvery 6 weeksEvery 8 days — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationAd-supportedFree — better
DevicesiPhoneiPhone, iPod — better
Requires iOS16.614.0 — better
Further details — not scored
Size45 MB37 MB
Age rating9+4+
DeveloperIlya OstashkovJongstra Samuel

Customer experience

Postfun

All ratings61 ratings
Positive82.0%
Neutral8.2%
Negative9.8%
Written reviews91 reviews
Positive70.3%
Neutral8.8%
Negative20.9%

Open To

Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Postfun

Subscriptions2
  • Postfun - Monthly subscription$2.991 Month
  • Postfun - Annual subscription$24.991 Year
None

Open To

No in-app purchases

Questions

Is Postfun free?
Postfun is free to download, with in-app purchases available.
Is Open To free?
Open To is free to download, with no in-app purchases.
Do Postfun or Open To have ads?
Postfun shows ads; Open To does not.
Which is updated more often, Postfun or Open To?
Postfun ships an update every 6 weeks, and Open To every 8 days. Most recently, Postfun was updated on October 16, 2026 and Open To on October 9, 2026.

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