Comparison

Fatigue Test TalTech vs PEM Diary

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

Head to head
About

Fatigue Test TalTech

Features
Read full description

This app is designed to collect data to assess mental fatigue through a series of tests where we assess your reaction speed, tremors and other data to provide a dataset that we can use to create a future rating system. This research is conducted by researchers at the Tallinn University of Technology Department of Software Science. You can ask to delete your data from our databases at any time. If you have any technical questions and concerns regarding the practices of this App, please contact us by sending an email to elli.valla@taltech.ee.

About

PEM Diary

This app helps individuals manage post-exertional malaise (PEM) by logging crashes, tracking severity, symptoms, and duration. It provides insights into patterns and creates a shareable record for personal reference or healthcare discussions.

Highlights
  • Log PEM crashes with dates
  • Track severity and symptoms
  • Add contextual notes
  • View trends on timeline/dashboard
  • 100% private local storage
  • Export data as CSV
Features
Read full description

Do you experience episodes of extreme fatigue? PEM Diary helps you log and track post-exertional malaise (PEM) with personal records, including severity, symptoms, and duration. Whether you’re managing ME/CFS (Myalgic Encephalomyelitis/Chronic Fatigue Syndrome) or dealing with unexplained fatigue, this app helps you identify patterns and keep a record for personal reference or discussions with your healthcare provider. FEATURES: - Log PEM crashes with start & end dates - Track severity (1–5 scale) & symptoms - Add notes for additional context - View trends with a timeline & dashboard - 100% private – all data is stored locally on your device and never leaves it unless you export it - Data export - export your collected data as a CSV which is easily shareable with health care professionals or studies Use PEM Diary to track PEM for personal insights or to support medical discussions and diagnosis efforts. Start managing your health more effectively today! PRIVACY & SECURITY Your health data never leaves your device unless you choose to export it. No cloud storage, no data sharing – complete privacy guaranteed. MADE FOR YOU Perfect for: • Tracking PEM patterns • Supporting healthcare discussions • Understanding your energy limits • Building a detailed health record MEDICAL NOTICE PEM Diary is a personal tracking tool. Always consult healthcare professionals for medical advice and treatment decisions. Download now to take control of your energy management journey! Start tracking your PEM episodes!

Screenshots

Fatigue Test TalTech3 screens
PEM Diary4 screens

Verdict

The call

The clearest difference is update cadence: Fatigue Test TalTech at weekly against PEM Diary's every 3 months. 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

Fatigue Test TalTech ships an update weekly, PEM Diary every 3 months. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 9 level
Fatigue Test TalTech versus PEM Diary: the parameters behind the verdict, then further details
ParameterFatigue Test TalTechPEM Diary
PriceFreeFree
Rating—4.0 (2 ratings) — better
Positive reviews—66.7% of reviews
Number of ratings—2 — better
Update frequencyWeekly — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone, iPod — better
Requires iOS16.215.1 — better
Further details — not scored
Size21 MB92 MB
Age rating4+17+
DeveloperTallinn TehnikaulikoolAdd Jam

In-app purchases

None

Fatigue Test TalTech

No in-app purchases

None

PEM Diary

No in-app purchases

Questions

Is Fatigue Test TalTech free?
Fatigue Test TalTech is free to download, with no in-app purchases.
Is PEM Diary free?
PEM Diary is free to download, with no in-app purchases.
Do Fatigue Test TalTech or PEM Diary have ads?
Neither Fatigue Test TalTech nor PEM Diary shows ads.
Which is updated more often, Fatigue Test TalTech or PEM Diary?
Fatigue Test TalTech ships an update weekly, and PEM Diary every 3 months. Most recently, Fatigue Test TalTech was updated on October 27, 2026 and PEM Diary on October 24, 2026.

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