Comparison

PKD App vs Tricky Words

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

Head to head
About

PKD App

This app provides essential information, practical tips, and support resources for individuals newly diagnosed with or in the early stages of autosomal dominant polycystic kidney disease (ADPKD). It serves as a centralized, accessible hub for credible health advice and links to further assistance.

Highlights
  • Credible ADPKD information
  • Health advice
  • Practical everyday tips
  • Links to further resources
  • Support network connections
Read full description

The self-help PKD App informs and educates people who are newly diagnosed or at the early stages of polycystic kidney disease (ADPKD). Open the app and... - Find credible information and health advice around ADPKD - all in one easily accessible place - Discover practical tips for everyday life - Get links to trusted further information and available support The PKD Charity and Expert Self Care created the app in partnership with Kidney Care UK, the National Kidney Federation, Kidney Research UK, the Scottish Kidney Federation, Kidney Wales, Popham Kidney Support, Genetic Alliance UK, Turn2us, UK Kidney Association, and the National Registry of Kidney Diseases.

About

Tricky Words

Features
Read full description

Tricky Words turns the UK government's official spelling lists into a science-backed practice routine that actually works - no fuss, no forgotten worksheets, no repeating yourself. This app replaces all your flashcards with a clever digital system on your phone. It asks the right words at the right time to ensure optimal learning and speed. OFFICIAL GOVERNMENT WORD LISTS, BUILT IN The National Curriculum specifies exactly which High Frequency Words (HFW) and Common Exception Words (CEW) every child must master from Reception through Year 6. We've built all of them in - over 650 words, organised by year and difficulty. When your child's school sends home a custom list, simply snap a photo, and the app automatically imports it alongside the built-in words. SMARTER PRACTICE WITH BUCKETS We use a proven spaced-repetition system to move words from short-term memory into long-term mastery - the exact same principle used in medical and language training worldwide. Words practised correctly move up through four levels. Mistakes reset a word to the beginning, ensuring it gets the extra attention it needs. The app handles all the scheduling, so you never have to think about which word to test next. REPEAT LIST When a word trips your child up, it goes on the Repeat List and comes back every few words - exactly when it needs reinforcing. Words stay on the list until they're answered correctly, and you can always see what's coming next. TAILORED TO YOUR CHILD Multi-child support means each child has their own library, progress tracker, and word selection. You choose exactly which school years and difficulty levels to include. Mark a word as "Mastered", and it disappears from practice for good. TWO-PHONE MODE If you'd rather not show your child the screen, pair two phones over Wi-Fi or Bluetooth. You control the session on your device while your child sees only a clean display, complete with a fanfare when they get it right.

Screenshots

PKD App4 screens
Tricky Words4 screens

Verdict

The call

The clearest difference is update cadence: Tricky Words at every 4 days against PKD App's every 6 months. PKD App's advantage is iOS requirement (14.3 vs 17.6). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PKD App ships an update every 6 months, Tricky Words every 4 days. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

Scorecard2 real differences · 8 level
PKD App versus Tricky Words: the parameters behind the verdict, then further details
ParameterPKD AppTricky Words
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyEvery 6 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad
Requires iOS14.3 — better17.6
Further details — not scored
Size30 MB52 MB
Age rating17+4+
DeveloperExpert Self Care LtdMoritz Schmittat

In-app purchases

None

PKD App

No in-app purchases

None

Tricky Words

No in-app purchases

Questions

Is PKD App free?
PKD App is free to download, with no in-app purchases.
Is Tricky Words free?
Tricky Words is free to download, with no in-app purchases.
Do PKD App or Tricky Words have ads?
Neither PKD App nor Tricky Words shows ads.
Which is updated more often, PKD App or Tricky Words?
PKD App ships an update every 6 months, and Tricky Words every 4 days. Most recently, PKD App was updated on October 14, 2026 and Tricky Words on October 3, 2026.

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