# fdm ferra data models

> fdm ferra data models (iPhone/iPad app by Ferra Solutions (Pty) Ltd.)

- Source: https://appshunter.io/ios/app/fdm-ferra-data-models/id1214202805 (this page in markdown: same URL + `.md`)
- Developer: [Ferra Solutions (Pty) Ltd](https://appshunter.io/developer/964514020)
- Category: Business, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 10.0 · 16 MB
- Languages: English
- Released: 2017-04-25
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/fdm-ferra-data-models/id1214202805/reviews.md

## What is fdm ferra data models?

fdm ferra data models

download from FRED, STATSSA or CSV
switch to dark mode, enjoy the syntax highlighting
then use your device and

- special projects to get you going

  > 10,000 digits of pi / e
  > RSA inflation
  > US GDP forecast
  > Obama vs Trump
  > Zuma vs Ramaphosa
  > Pandemic virus infections simulation

- forecast

  > moving averages, exponential smoothing
  > OLS, ARIMA
  > periodogram and extrapolated periodic trends
  > kalman filter

- perform mean and variance tests

- do probability and stress tests

  > scenario building and stress testing
  > simulations
      o SIR model

- optimise and solve problems

  > grid search
  > nelder-mead simplex
  > polak-ribière, fletcher-reeves
  > newton-raphson
  > root finding
  > eigenvalues

- have fun with the arbitrary precision calculator

  > time series
  > matrices
  > different random number generators
      o mixmax https://en.wikipedia.org/wiki/MIXMAX_generator
      o squares https://arxiv.org/abs/2004.06278

- store in iCloud and also use your other device

  > old device?
      o we care for you iOS 10 still supported

only iOS, impress your friends

website https://fdm.ferrasolutions.com
terms of use https://fdm.ferrasolutions.com/docs/about/tou/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| fdm Premium | $24.99 | per year |
| fdm Regular | $2.49 | per month |



## Version history (last 1 release)

### 2.11.2 — 2020-11-10

Bug fixes and minor improvements

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## More apps by Ferra Solutions (Pty) Ltd

- [Nap1](https://appshunter.io/ios/app/nap1/id964514021)
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All apps by Ferra Solutions (Pty) Ltd: https://appshunter.io/developer/964514020

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-19.*