Comparison

Outside In. vs StackFlow

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

Head to head
About

Outside In.

Stream live outdoor sounds from one iPhone to another over Wi-Fi. Use a spare phone as an outdoor microphone to fall asleep to real-time nature sounds, reducing late-night scrolling. Audio plays continuously in the background, even with the screen locked.

Highlights
  • Live audio streaming over Wi-Fi
  • Use spare phone as outdoor mic
  • Background audio playback
  • Screen lock compatible
  • Face-down listening mode
  • No cloud or recording
  • No account required
Features
Read full description

Outside In streams live outdoor sound from one iPhone to another over your home Wi-Fi. Place a spare phone outside — on a porch, by a window, in the yard — and keep one by the bed. Audio plays continuously in the background, even when the screen is locked, so you can fall asleep to the sounds of crickets, rain, or a quiet street without opening a window. Further, to help you reduce late-night scrolling, the sounds of nature will only play from your indoor phone if it is face down — such as on your nightstand. Hear the night as it is. Most sleep apps play recordings. Outside In lets you hear what's happening outside right now. Turn a spare phone into a live outdoor microphone. Keep your main phone by the bed. Crickets. Rain. Wind in the trees. Distant traffic. An owl somewhere in the dark. No sound libraries. No looping tracks. No generated ambience. Place one phone outside. Keep one by the bed. Flip face down to listen. Audio never leaves your Wi-Fi network. No accounts. No cloud. Nothing recorded. Set the phones. Dim the lights. Let the room settle. Tonight, instead of scrolling --- listen. Note: This app makes use of Background Audio. One phone (the "Outside" phone) continuously receives and streams audio to the second phone (the "Inside" phone) which utilizes background audio to play those sounds while you go to sleep.

About

StackFlow

This app helps you manage complex supplement routines by scanning labels, providing AI-driven timing suggestions based on ingredient interactions, and tracking your body's response. It visualizes synergy and spacing for optimal intake.

Highlights
  • AI-powered supplement timing
  • Supplement label scanning
  • Ingredient-level intelligence
  • Synergy and spacing visualization
  • Daily routine tracking
  • Body response logging
  • Daily insights feed
Features
Read full description

Taking multiple supplements every day? The hard part is not remembering them — it is knowing what goes together, what needs spacing, and when each one works best. StackFlow turns supplement chaos into a clear, executable daily system. BUILT ON 200K+ REAL SUPPLEMENT PRODUCTS Search or scan real products with real ingredients, real serving sizes, and real label facts — not a generic vitamin list. INGREDIENT-LEVEL INTELLIGENCE StackFlow maps each product to its actual ingredients, so you understand what you are really taking — not just the brand name on the bottle. SCAN A LABEL, ADD IN SECONDS Point your camera at any supplement label. StackFlow reads the product, maps the ingredients, and places it into your routine. AI TIMING PLANS THAT EXPLAIN WHY Get timing suggestions based on ingredient interactions, absorption rules, and your current stack. Every recommendation shows the reasoning behind it. SYNERGY AND SPACING, MADE VISIBLE See which supplements work better together, which ones need to be spaced apart, and why your routine is organized the way it is. YOUR DAILY COMMAND CENTER Open StackFlow each morning. See exactly what to take now, check off each time slot, and keep your routine moving without guesswork. TRACK HOW YOUR BODY RESPONDS Log energy, sleep, digestion, and other signals. Over time, connect your routine to what you actually notice. DAILY INSIGHTS FEED (PRO) Receive a curated daily digest based on your stack, check-ins, and patterns — not a generic health tip, but intelligence about your specific routine. StackFlow is built for people who take supplement routines seriously. It is not medical advice, diagnosis, or treatment. Privacy Policy: https://www.stackflow.life/privacy.html Terms of Use (EULA): https://www.stackflow.life/terms.html

Screenshots

Outside In.4 screens
StackFlow4 screens

Verdict

The call

The clearest difference is in-app purchases: Outside In. at none against StackFlow's 2. On price, rating, ratings volume and ads 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. StackFlow sells 2 in-app purchases, starting at $4.99 per month. Outside In. asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Outside In. against 5.0 for StackFlow. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Scorecard2 real differences · 8 level
Outside In. versus StackFlow: the parameters behind the verdict, then further details
ParameterOutside In.StackFlow
PriceFreeFree
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews—100.0% of reviews
Number of ratings11
Update frequency—Every 2 weeks
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better17.6
Further details — not scored
Size3 MB5 MB
Age rating4+4+
DeveloperChristopher Bennett航东 郭

Customer experience

Outside In.

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

StackFlow

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Outside In.

No in-app purchases

2 purchases

StackFlow

Subscriptions2
  • StackFlow Pro Monthly1 Month trial$4.991 Month
  • StackFlow Pro Annual$29.991 Year

Questions

Is Outside In. free?
Outside In. is free to download, with no in-app purchases.
Is StackFlow free?
StackFlow is free to download, with in-app purchases available.
Which has better reviews, Outside In. or StackFlow?
Outside In. and StackFlow are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do Outside In. or StackFlow have ads?
Neither Outside In. nor StackFlow shows ads.

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