Outside In. vs StackFlow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- AI-powered supplement timing
- Supplement label scanning
- Ingredient-level intelligence
- Synergy and spacing visualization
- Daily routine tracking
- Body response logging
- Daily insights feed
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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
Verdict
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
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.
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.
| Parameter | Outside In. | StackFlow |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 1 |
| Update frequency | — | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 3 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Christopher Bennett | 航东 郭 |
Customer experience
Outside In.
StackFlow
In-app purchases
Outside In.
No in-app purchases
StackFlow
- StackFlow Pro Monthly1 Month trial$4.991 Month
- StackFlow Pro Annual$29.991 Year









