Comparison

Lightning Simulator vs Gut Health Tracker

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

Head to head
About

Lightning Simulator

Simulate a lightning storm with visual effects using your device's backlight and LED flash, accompanied by realistic thunder audio. Customize storm distance and set sleep timers for a unique ambiance.

Highlights
  • Backlight and LED flash simulation
  • Realistic thunder audio
  • 5 unique storm types
  • Customizable storm distance
  • Adjustable sleep timers
Features
Read full description

This is for all the lightning lovers out there. Turn your room into a thunderstorm. Lightning plays immersive thunderstorm soundscapes and syncs the light to the thunder: the screen dims to black, then pulses and flashes with every rumble — and on the loudest strikes, fires the camera flash like real lightning. Set the storm's distance and the thunder trails the flash, just as it does in a real storm. Best experienced in a dark room, with the screen and camera flash exposed and the audio through speakers or headphones. Made to fall asleep to. A sleep timer gently fades the audio and light to black instead of cutting out, so it never jolts you awake. FREE • The Starter Storm, full flash + thunder experience • Storm distance (flash-to-thunder delay) • Sleep timer with a gentle fade-out LIGHTNING PRO — one-time purchase, yours forever • Every storm — all six soundscapes • Immersion modes — screen-only, soft ambient glow, and warm-to-cool lightning color • Haptic thunder — feel every strike • Storm control — strike intensity and an approaching-storm mode • Gapless playlists with seamless crossfade • A StandBy / Lock Screen storm clock widget • Longer overnight sleep timers • Save custom presets No accounts, no tracking, no ads. Everything runs on-device. Already bought the old Storm Expansion? Tap Restore, you're upgraded to Lightning Pro for free. Relax and unwind, Go ahead, Enjoy the Storm.

About

Gut Health Tracker

Features
Read full description

Bloated again and no idea why? TummyLog is a private gut health diary for people living with IBS, bloating, constipation or unexplained stomach trouble. Log meals, symptoms and bowel movements on the Bristol Stool Scale, see which foods you tend to eat before flare-ups, and ease a rough moment with guided belly massage — all on your phone, no account, nothing uploaded. Most trackers stop at the log. TummyLog pairs an honest food and symptom diary with four guided abdominal massage routines — the ILU stroke, colon sweep, clockwise circles and wind relief — so the same app that helps you find your patterns also helps you get through tonight's bloating. And when your GI appointment finally comes around, you walk in with a clean, dated record instead of a vague "it happens sometimes." WHAT YOU GET • A three-second entry: meal, symptom severity or bowel movement on the proper 7-type Bristol Stool Scale — logged before the moment passes • A pattern view that counts which tags — dairy, gluten, caffeine, stress and more — showed up in the 24 hours before your symptoms, so "is it the coffee?" gets an answer from your own data • Four guided belly massage techniques with step-by-step instructions, a session timer, a daily goal ring and a streak that keeps the habit alive • 7-day charts of symptom severity and massage minutes plus your Bristol type distribution — your whole week at a glance • CSV export: hand your doctor a dated record of every meal, symptom and bowel movement instead of guessing from memory • A plain-language Learn section: the Bristol scale explained, everyday gut habits, and the red-flag symptoms that mean see a doctor, not an app PERFECT FOR • Anyone with IBS or suspected food sensitivities who keeps being told "keep a food diary" and never sticks with one • People with bloating, gas or constipation who want relief tonight and answers over time • Patients preparing for a GI appointment who want to arrive with dates and details instead of memory • Late-night searchers of "why does my stomach hurt" who would rather build their own record than read another scary search result WHY NOT JUST USE NOTES? A notes app can hold what you ate. It can't put a bowel movement on the Bristol scale, count which foods preceded your flare-ups, chart your week, walk you through a wind-relief massage, or export a doctor-ready CSV. TummyLog turns scattered scribbles into a record you can actually act on. PRIVATE BY DEFAULT Your gut is nobody's business. Every entry stays in the app's local database on your iPhone — no account, no sign-up, no cloud, nothing sent anywhere. Deleting the app deletes your data. FULL ACCESS TummyLog Pro unlocks all four massage techniques, the trend charts, the Bristol distribution, the 24-hour pattern view and CSV export. Choose a weekly or yearly auto-renewing subscription, or a one-time lifetime purchase. TummyLog records what you enter. It does not diagnose, treat or give medical advice. Log your first meal tonight — by this time next week, you'll have your first pattern. Terms of Use: https://leanstudio.asia/terms-of-use Privacy Policy: https://leanstudio.asia/privacy-policy Support: support@leanstudio.asia

Screenshots

Lightning Simulator2 screens
Gut Health Tracker4 screens

Verdict

The call

The clearest difference is in-app purchases: Gut Health Tracker at none against Lightning Simulator's 2. Lightning Simulator's advantage is device support (3 vs 1). On price, update cadence, ads and iOS requirement 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. Lightning Simulator sells 2 one-off in-app purchases. Gut Health Tracker asks for nothing beyond the download.

UpkeepUpdate frequency

Lightning Simulator ships an update every 4 months, Gut Health Tracker every 3 months. The most recent releases landed on October 16, 2026 and October 17, 2026 respectively.

Scorecard2 real differences · 8 level
Lightning Simulator versus Gut Health Tracker: the parameters behind the verdict, then further details
ParameterLightning SimulatorGut Health Tracker
PriceFreeFree
Rating4.8 (101 ratings) — better—
Positive reviews86.8% of reviews—
Number of ratings101 — better—
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple TV — betteriPhone
Requires iOS18.017.0 — better
Further details — not scored
Size42 MB3 MB
Age rating4+4+
DeveloperFoxbit Software Ltd.LEAN ASIA CO., LTD

In-app purchases

2 purchases

Lightning Simulator

One-time2
  • Storm Expansion Pack$1.99
  • Lightning Pro$1.99
None

Gut Health Tracker

No in-app purchases

Questions

Is Lightning Simulator free?
Lightning Simulator is free to download, with in-app purchases available.
Is Gut Health Tracker free?
Gut Health Tracker is free to download, with no in-app purchases.
Do Lightning Simulator or Gut Health Tracker have ads?
Neither Lightning Simulator nor Gut Health Tracker shows ads.
Which is updated more often, Lightning Simulator or Gut Health Tracker?
Lightning Simulator ships an update every 4 months, and Gut Health Tracker every 3 months. Most recently, Lightning Simulator was updated on October 16, 2026 and Gut Health Tracker on October 17, 2026.

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