The pricing outlined below will cover most applications, with a few restrictions. If you have an unusual business model or special circumstances, please feel free to contact us to discuss your situation. We love being involved in interesting projects, and having our tools put to work helping people.

ULAPI REST: Ultralingua's web-based API

  • An annual fee of $5000 for up to 1,000,000 queries.
  • $2,000 for each additional increment of 1,000,000 queries.
  • All Ultralingua datasets are included in the price.

ULAPI for iOS apps

  • 5% of net (after taxes and Apple’s 30% cut) for non-free apps.
  • 50% of net for in-app sales consisting mainly of ULAPI features.
  • All Ultralingua datasets are included in the price.
  • For free apps, contact us.


  • For consumer applications, 5% of purchase price (minus distributor fees like Apple’s cut from the Mac App Store)
  • All Ultralingua datasets included in the price.
  • For enterprise applications, contact us.


The pricing models described above are guidelines. In all cases, the actual price will be determined by a signed agreement between you and Ultralingua, Inc. We reserve the right to require different pricing terms than those described above, depending on the circumstances.

In most cases, your use of Ultralingua's tools and data will be supplementary to the main purpose of your application. For example, you might create a document reader for iOS that includes Ultralingua's pop-up dictionary as an enhancement. In such cases, the pricing above will almost certainly apply.

If, on the other hand, your application's main purposes are served by ULAPI or Ultralingua's data, then we will require a larger licensing fee or royalty. As an extreme example, if you created a dictionary app whose main intent was to use ULAPI and Ultralingua's data to compete directly with Ultralingua's consumer products, we might agree to the arrangement, but our price would be substantially higher.