# Ap Treiglo

> Welsh mutation checker and revision tool for speakers and learners. (iPhone/iPad app by University of Wales Trinity Saint David.)

- Source: https://appshunter.io/ios/app/ap-treiglo/id1071126274 (this page in markdown: same URL + `.md`)
- Developer: [University of Wales Trinity Saint David](https://appshunter.io/developer/849747329)
- Category: Education, Reference
- Price: Free
- Rating: 4.50/5 from 2 App Store ratings · 8 written reviews indexed
- Age rating: 17+
- Requires: iOS 8.0 · 116 MB
- Languages: English
- Released: 2016-03-25
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ap-treiglo/id1071126274/reviews.md

## What is Ap Treiglo?

Nod Ap Treiglo ydy cynorthwyo siaradwyr Cymraeg a dysgwyr i wirio’r treigladau. Mae elfen chwilota’r ap dim ond yn cynnwys y geiriau hynny sy’n achosi i’r geiriau sy’n eu dilyn yn syth dreiglo. Felly nid yw’n cynnwys pob rheol treiglo yn y Gymraeg. Ond wrth ddefnyddio elfen adolygu yr ap, dylech allu dod o hyd i’r holl reolau fydd yn eich cynorthwyo i wybod pryd i dreiglo.
Wrth ddefnyddio’r ap hwn, dylech gofio rhai egwyddorion cyffredinol … 

*  Dydy enwau priod (proper nouns) ddim fel arfer yn treiglo – i Dafydd
*  Dim ond enwau lleoedd Cymraeg fydd yn treiglo – o Fryste, ond o Birmingham
*  Fydd enwau sydd wedi eu benthyg o’r Saesneg ddim fel arfer yn treiglo e.e. dwy gêm

The aim of this app is to help Welsh speakers and learners to check mutations. The search element of the app only includes those words that will cause the immediate word that follows to mutate. Therefore, this element does not include every rule with regards to mutations. However, the revision element of the app is more comprehensive, and it is aimed as a tool to aid revision of the mutation rules. 

Please bear the following principles in mind while using the app …

*  Proper nouns will not mutate –i Dafydd
*  Only Welsh place names will mutate – to Bristol > i Fryste, but, to Birmingham > i Birmingham
*  Nouns that have been ‘borrowed’ from the English language will not usually mutate – two games > dwy gêm

## Key features

- Check Welsh mutations
- Search for mutating words
- Revision tool for mutation rules
- Learn mutation principles
- Proper noun mutation exceptions
- Welsh place name mutation rules

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/ap-treiglo/id1071126274/reviews.md

### 1/5 — Ap treiglo

*2020-10-24, version 1.0*

Bechod, mae’n gwrthod agor

### 1/5 — Does not work.

*2020-06-16, version 1.0*

App used to work but now doesn’t work at all. Good idea and super helpful to perfect my Welsh - but simply doesn’t work.

### 5/5 — Ap Treiglo

*2020-06-06, version 1.0*

Hoffwn ddefnyddio’r App yma ond ddim yn gweithio bellach ar fy mhrif ffôn. Yn siomedig, felly.

### 1/5 — Just doesn’t work.

*2020-05-02, version 1.0*

This app just doesn’t work (iPhone 11, iOS 13.3.1). Either fix it or remove it from the App Store.

### 1/5 — Won’t open

*2020-03-02, version 1.0*

Did work once but stopped months ago and reinstalling doesn’t solve the problem

### 1/5 — No good

*2020-02-29, version 1.0*

Doesn’t open☹️

### 1/5 — Doesn't open

*2019-12-10, version 1.0*

Doesn't open since the new iOS update!

### 5/5 — Ap Treiglo

*2016-08-29, version 1.0*

Rhagorol

## Frequently asked questions about Ap Treiglo

### What is Ap Treiglo?

Ap Treiglo is an educational tool designed to help Welsh speakers and learners check and understand Welsh mutations. It offers both a search function for specific mutating words and a more comprehensive revision element for the mutation rules.

### How does Ap Treiglo help with learning mutations?

The app provides a search function that identifies words causing immediate mutations and a revision element that covers a broader range of mutation rules. It also highlights general principles like proper nouns not usually mutating.

### Does Ap Treiglo cover all Welsh mutation rules?

The search element of Ap Treiglo focuses only on words that directly cause mutations. However, the revision element is more comprehensive and aims to cover all rules to aid in understanding when to mutate.

### What are some general principles of Welsh mutations mentioned in Ap Treiglo?

Ap Treiglo notes that proper nouns typically do not mutate (e.g., 'i Dafydd'), only Welsh place names mutate (e.g., 'i Fryste'), and words borrowed from English usually do not mutate (e.g., 'dwy gêm').

### What is the rating and price of Ap Treiglo?

Ap Treiglo has a rating of 4.5 stars from 2 ratings and is available for free. There are no in-app purchases or subscription fees.

### On which devices can I use Ap Treiglo?

Ap Treiglo is supported on iPhones and iPods. It is designed for iOS devices.

### When was Ap Treiglo last updated?

Ap Treiglo was released on March 25, 2016, and its latest version is 1.0, with the last update also on March 25, 2016. It has not received updates since its initial release.

### What is the age rating for Ap Treiglo?

Ap Treiglo has an age rating of 17+. This rating is typically given due to the nature of the content or its complexity, though the app itself is an educational tool.

## Version history (last 1 release)

### 1.0 — 2016-03-25

This app has been updated by Apple to display the Apple Watch app icon.

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## More apps by University of Wales Trinity Saint David

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All apps by University of Wales Trinity Saint David: https://appshunter.io/developer/849747329

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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 2026-06-01.*