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We build apps you can trust

Aplo Apps (formerly “Developing for Fun”) is the independent app studio of Nikolaos Sarantinos. We build apps for iPhone, iPad and Mac. Each one is focused on what matters, private by design and free of ads.

Our principlesGet in touch
founded by Nikolaos Sarantinos
2025
apps released, one more in progress
4
average of all 9 App Store ratings across 4 apps (our own calculation)Source and notes on these ratings
5.0
ads, trackers or required accounts
0
Principles

What we hold ourselves to

Three principles that apply to every app⁠—from the first sketch to the next update.

  1. Made for your device

    Every app follows the conventions of its platform⁠—the patterns you already know from your device, not an interface that only sort of fits everywhere.

  2. Private by design

    Your data belongs to you. Our apps work without an account and keep everything on your device. They only sync when you want them to⁠—through your own cloud storage, such as iCloud. A copy of your content never ends up with us.

    • No ads
    • No tracking, no third-⁠party analytics
    • No account required
    • On your device, with optional iCloud sync
    Read the privacy policy

  3. Personal support

    We read every message ourselves and reply personally⁠—usually within two business days, in English or German.

Portfolio

The portfolio so far

Since 2025, four apps have been released, with one more in progress. Each one does a clearly defined job instead of trying to do everything.

  1. 2025

    1. Released in

    2. Released in

  2. 2026

    1. Released in

    2. Released in

  3. Up next

    1. In progress

      Coming soonHealth & FitnessiPhoneApple Watch

      Aluneli

      Calm, private intermittent fasting on iPhone and Apple Watch.

View all apps

Craft

How we build our apps

Wherever we can, we build on the platform’s own technologies. That keeps the apps lean and easy to maintain⁠—and your data where it belongs.

  • iOS · iPadOS · macOS

    Instantly familiar

    Every app follows the conventions of its platform, so navigation, controls and settings work the way you already know from your device.

    Used inAll released apps
  • CloudKit

    Sync through iCloud

    Optional sync runs on Apple’s CloudKit and your private iCloud storage. We don’t run a database of our own that holds your content.

    Used in
    • Renewal Radar
    • Presence
  • App Store

    Purchases through the store

    In-⁠app purchases and subscriptions are sold through the store you got the app from. Payment, renewal, cancellation and refunds stay with the store⁠—we never see payment details.

    Used inAll released apps
  • Local-⁠first

    On your device first

    Your data is stored locally first, so the apps keep working without a connection⁠—the Einbürgerungstest app even runs fully offline.

    Used in
    • Einbürgerungstest
    • Renewal Radar
    • Presence
  • Face ID · Touch ID

    Locked where it matters

    Contracts and subscriptions are personal, so Renewal Radar can be protected with an app lock using Face ID or Touch ID.

    Used in
    • Renewal Radar
  • DE · EN · FR · ES

    Built for several languages

    Presence adapts its interface, invoice wording and regional defaults to English, German, French and Spanish⁠—per document too.

    Used in
    • Presence

Launch is where the work continues

An app is never finished. When official requirements change, we update it.

  • US Citizenship & Civics TestVersion 1.2 · October 2026

    A new name and a rebuilt app: free practice, spoken answers checked on the device, a free mock interview every day with the USCIS stop rules, reading and writing practice and help in 9 languages⁠—for the 2025 civics test with 128 questions and the 2008 test.

  • German Citizenship ExplainedVersion 1.6 · October 2026

    A new name, a new icon and an exam mode that follows the real test. Plus practice with no daily limit, the mistakes list and progress without Premium, translation right below the question and answers, and reworked explanations⁠—now also for every state question.

We build websites, too

Fast, clear sites for small businesses, clubs and local projects⁠—private by design, with no trackers.

How we build websites
Contact

Let’s talk

Have feedback on an app, an idea for a feature or a project in mind? Write to us⁠—we read every message ourselves and reply personally.

Email usHelp with an app

info@aploapps.comUsually within two business days

What’s it about?