Comparison

Physarum vs Auto Diary

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

Head to head
About

Physarum

Explore the fascinating emergent behavior of slime molds through a visually rich simulation. Adjust agent parameters, influence growth with intuitive controls, and discover complex, mesmerizing patterns.

Highlights
  • Slime mold behavior simulation
  • Autonomous agent control
  • Adjustable agent parameters
  • Maze solving and network formation
  • Vibrant color modes
  • Interactive system manipulation
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Explore artificial life through a living, flowing simulation inspired by Physarum polycephalum, the slime mold famous for forming networks, solving paths, and showing intelligence without a brain. Physarum turns simple local rules into complex motion. Thousands of agents sense trails, turn, move, and deposit new traces. As the field evolves, branching networks, waves, and organic textures emerge in real time. Use Physarum to: - Tune sensor distance, turn angle, movement, and trail strength - Paint into the field and guide the simulation by touch - Explore chaotic, branching, and self-organizing patterns - Save and restore interesting agents, fields, and rules - Create vivid generative visuals with color controls It is part science toy, part generative art studio, and part meditative visual instrument. Whether you study emergent systems, teach artificial life, or simply enjoy hypnotic motion, Physarum gives you a hands-on way to watch complexity grow from simple behavior.

About

Auto Diary

Features
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AI-assisted Auto Diary — Let AI Write Your Story Just live your day. Auto Diary quietly records your activities — places visited, walks taken, sleep patterns, weather changes — then transforms them into a beautifully written diary with a single tap. See Yourself Through New Eyes Reading your own day narrated by AI creates a powerful psychological distancing effect. By viewing your experiences from a third-person perspective, you gain clarity, emotional balance, and deeper self-understanding — a recognized therapeutic technique now at your fingertips. One Sketch, Many Voices From a simple outline of your day, AI crafts your diary in six distinctive styles: · Lyrical Essay — warm, poetic reflections on everyday moments · Therapeutic — gentle self-compassion and emotional healing · Gratitude Journal — discover hidden blessings in ordinary days · Self-Reflection — deep, honest analysis of your thoughts and actions · Bright & Cheerful — humor and positive energy to lift your spirit · Minimal Record — clean, factual, no-frills journaling Learn Languages Naturally Write your diary in any of 10 supported languages, or choose Bilingual Mode to see your native language paired with an English translation — turning daily journaling into effortless language practice. Supported Languages: Korean, English, Japanese, Chinese, Spanish, French, German, etc. Your Privacy, Protected All diary entries, events, and personal data are stored exclusively on your device. Nothing is uploaded to any server. Your thoughts remain yours alone. Key Features: · Automatic life-logging: location, activity, sleep, weather · AI diary generation powered by Google Gemini · 6 writing styles to match your mood · AI editing tools: proofread, rewrite, expand, shorten · Bilingual mode for language learners · PDF export with cover page and table of contents · Weekly emotional review and pattern insights · Personal profile for natural name and relationship references · Beautiful, ad-minimal reading experience Start capturing your life story today. One tap. One diary. A new perspective on you. Is it really free? Auto Diary uses the Google Gemini API for AI writing. While API registration requires a paid account, actual usage for diary writing and map features is so minimal that no charges are incurred in practice. The API key takes less than a minute to obtain.

Screenshots

Physarum4 screens
Auto Diary4 screens

Verdict

The call

The clearest difference is in-app purchases: Auto Diary at none against Physarum's 6. Auto Diary also leads on iOS requirement (13.0 vs 26.0). On price, update cadence, ads 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. Physarum sells 3 one-off in-app purchases. Auto Diary asks for nothing beyond the download.

UpkeepUpdate frequency

Physarum ships an update every 5 weeks, Auto Diary every 6 weeks. Both last shipped on October 15, 2026.

Scorecard2 real differences · 8 level
Physarum versus Auto Diary: the parameters behind the verdict, then further details
ParameterPhysarumAuto Diary
PriceFreeFree
Rating4.8 (27 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings27 — better—
Update frequencyEvery 5 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.013.0 — better
Further details — not scored
Size32 MB46 MB
Age rating4+4+
DeveloperGEORGY OSTROBRODHeebok Lee

In-app purchases

3 purchases

Physarum

One-time3
  • Small developer tip2 variants$1.99
  • Medium developer tip2 variants$3.99
  • Big developer tip2 variants$5.99
None

Auto Diary

No in-app purchases

Questions

Is Physarum free?
Physarum is free to download, with in-app purchases available.
Is Auto Diary free?
Auto Diary is free to download, with no in-app purchases.
Do Physarum or Auto Diary have ads?
Neither Physarum nor Auto Diary shows ads.
Which is updated more often, Physarum or Auto Diary?
Physarum ships an update every 5 weeks, and Auto Diary every 6 weeks. Most recently, Physarum was updated on October 15, 2026 and Auto Diary on October 15, 2026.

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