I/O Frog vs Lucid Mind
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
I/O Frog
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IOFrog brings essential operational visibility to your iPhone. Use iofrog to view key dashboard cards optimized for mobile, track important device and operational status at a glance, receive push notifications for critical events, built for fast daily use, IOFrog helps teams stay informed, react sooner, and keep operations under control wherever they are. Note: IOFrog requires an existing account and backend environment configured by your organization.
Lucid Mind
This app provides a peaceful digital space for organizing thoughts, storing ideas, and receiving insights from others. It offers a calming interface designed for night use, allowing users to express themselves freely and anonymously.
- Organize thoughts and ideas
- Anonymous idea sharing
- Receive insights from competent users
- Peaceful night-time interface
- Thought visualization as stars
- Mind area for concept mapping
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Thought is a simple, emotional and peaceful room made for night usage. It is the perfect place for a confused mind. Designed to keep everything you think; organized, easily accessible and pleasing to read. Everything about you is important for Thought and it will improve in every way to make you feel that way. You can let go of your burdens, or store precious ideas. You can share every idea you have, no one will know who shared it; and you will receive answers from the most competent people on the subject, it all works like magic. Receive answers on things you write, or relieves on things that burden you When you use your phone at night, maybe in your bed or outside, it's screen spoils the whole darkness. Night Thought, is all about making you feel like you are a part of the night. You can think and write whatever you want in this peaceful little sky. Or you can make a wish and watch a star sliding with it Night Thought is a relaxing and simple place where you don't get distracted. It's like writing your own thoughts into the sky. Talking with stars, and even watching your thoughts become stars. You will have shiny little stars with you, also everything you typed will wait you there as a star. Subscription Service: 1. Required to access the app's capabilities 2. Creating thoughts, stars, thought shows, mind area Payment models for Book Write Subscription • Night Thought Monthly Subscription: $2.99 per month, • Night Thought Yearly Subscription: $17.99 per year Terms of Use: https://hiappsco.wordpress.com/2022/01/05/night-thought-terms-of-use/ Privacy Policy: https://hiappsco.wordpress.com/2022/01/05/night-thought-privacy-policy/ • Payment will be charged to iTunes Account at confirmation of purchase. • Account will be charged for renewal within 24-hours prior to the end of the current subscription period. • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. • Any unused portion of a free trial period will be forfeited when the user purchases a subscription to that publication.
Screenshots
Verdict
The clearest difference is in-app purchases: I/O Frog at none against Lucid Mind's 2. Lucid Mind's advantage is iOS requirement (15.0 vs 18.0). 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
Both are free to download. Lucid Mind sells 2 in-app purchases, starting at $12.99 per month. I/O Frog asks for nothing beyond the download.
Both ship on a similar rhythm, roughly every 2 months. Both last shipped on November 11, 2026.
| Parameter | I/O Frog | Lucid Mind |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.0 (4 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Subscription |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 18.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 126 MB | 29 MB |
| Age rating | 4+ | 4+ |
| Developer | Sigfrog s.r.o. | Kaan Yildiz |
In-app purchases
I/O Frog
No in-app purchases
Lucid Mind
- Night Thought Monthly$12.991 Month
- Night Thought Yearly3 Days trial$59.991 Year









