Comparison

FeverApp vs Proof

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

Head to head
About

FeverApp

Features
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FeverApp is your diary to document acute infectious diseases, medication intake, symptoms, vaccines, and more for you and your family. The multimedia library helps to understand illness as a process and fever as a resource of your immune system. It is based on current guidelines regarding fever and febrile diseases. Use the medication scanner to add medicines to your list and track the intake quantity, date and time. FeverApp features: - Create separate profiles for each family member - Document and overview febrile episodes and diseases over time - Document febrile seizures - Document symptoms, measures and medications - Super easy new medication scanning feature - A graph view of well-being and other details - Set reminders for temperature measurements - Receive helpful tips from β€œDr. Fee” - Brief informative videos - Read about recent scientific articles and guidelines about fever - Find medication alternatives in Info library Important notes: - To use FeverApp you need a family code, which you can receive from the cooperating medical practices. Please contact us via www.feverapp.de . - FeverApp does not measure temperature. To measure temperature a separate thermometer is necessary. - Your input in the Feverapp helps Prof. David Martin and his team from the University Witten/Herdecke gain a deeper understanding of fever. The project is finantially supported by a grant from the the German Ministry of Education and Research Available languages: German, English and Russian

About

Proof

Features
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Every habit app trusts you to tell the truth. That's why they don't work. Proof verifies your habits. A live photo checked by AI. A real workout read from Apple Health. A screen-time limit you actually kept. If it isn't verified, it doesn't count β€” and your streak knows it. HOW IT WORKS 1. Pick a habit. Proof shows you exactly how you'll prove it before you commit. 2. Do the thing. 3. Prove it β€” a live in-app photo, or an automatic check against Apple Health. 4. AI returns a verdict in seconds. Verified days build the streak. Nothing else does. SIX WAYS TO PROVE IT β€’ Photo β€” snap live evidence; AI reads the scene against your habit's rule β€’ Apple Health β€” workouts and steps verify themselves, no photo needed β€’ Timer β€” a focus session that fails if you leave the app β€’ Screen limit β€” stay under your daily minutes; the day verifies overnight β€’ Quit β€” a daily check-in plus an optional continuity photo of the untouched item β€’ Honor β€” simple check-ins for the things no camera can see BUILT SO YOU CAN'T CHEAT β€’ Live capture only β€” you can't upload yesterday's photo from your library β€’ No backfilling and no editing history β€’ Repeat photos get caught β€’ The streak is the honest number, or it's nothing ALSO INSIDE β€’ App blocking β€” lock distracting apps until you've proven your day β€’ Real alarms for wake-up habits β€’ Journal β€” every verified day as a grid or a calendar β€’ Milestones at 7, 30, 75, 100 and 365 days β€’ Share cards in ten styles, each stamped AI Verified β€’ Home Screen widget with today's status β€’ 75 Hard as a one-tap bundle Privacy Policy: https://proofhabit.com/privacy Terms of Use: https://proofhabit.com/terms

Screenshots

FeverApp4 screens
Proof4 screens

Verdict

The call

The clearest difference is in-app purchases: FeverApp at none against Proof's 1. FeverApp also leads on iOS requirement (15.0 vs 17.0). Proof's advantage is update cadence (every 2 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Proof sells 1 in-app purchase, starting at $14.99 per month. FeverApp asks for nothing beyond the download.

UpkeepUpdate frequency

FeverApp ships an update every 3 months, Proof every 2 weeks. The most recent releases landed on October 11, 2026 and October 5, 2026 respectively.

Scorecard3 real differences Β· 3 level
FeverApp versus Proof: the parameters behind the verdict, then further details
ParameterFeverAppProof
PriceFreeFree
Update frequencyEvery 3 monthsEvery 2 weeks β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
DevicesiPhone, iPod β€” betteriPhone
Requires iOS15.0 β€” better17.0
Further details β€” not scored
Size41 MB4 MB
Age rating12+17+
DeveloperDavid MartinDevin Tripp

In-app purchases

None

FeverApp

No in-app purchases

1 purchases

Proof

Subscriptions1
  • Proof Pro7 Days trial$14.991 Month

Questions

Is FeverApp free?
FeverApp is free to download, with no in-app purchases.
Is Proof free?
Proof is free to download, with in-app purchases available.
Do FeverApp or Proof have ads?
Neither FeverApp nor Proof shows ads.
Which is updated more often, FeverApp or Proof?
FeverApp ships an update every 3 months, and Proof every 2 weeks. Most recently, FeverApp was updated on October 11, 2026 and Proof on October 5, 2026.

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