ThreeLinesDiary vs PRISM
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ThreeLinesDiary
A simple journaling app designed to improve sleep quality by encouraging users to write a three-line diary entry before bed. It allows for photo attachments and provides daily reminders to help build a consistent writing habit.
- Three-line daily journal entries
- Attach photos to entries
- Daily writing reminders
- Improve sleep quality
- Simple and intuitive interface
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Write become just're autonomic nerve health. Write before going to bed, sleep quality is improved. 3-line diary which is said to have this effect. This app is an app that aims to write such a three-line diary. The has been prepared three items we wrote so good a word. In some cases, you might want be left with a photograph. In this app, you can save with a photo for each of the three items. Also to write every day, you might forget. In this app, by making a notification to the specified time, you will be able to habit to write at the same time each day.
PRISM
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PRISM is a wireless device management app that enables instant Bluetooth connection for fast, on-site configuration, monitoring, and testing—no laptop required. Key Features - Instant Bluetooth pairing with devices - Fast device setup and configuration in seconds - Real-time device status (IP, MAC, CPU, temperature) - Advanced wireless settings (60GHz, channel, bandwidth, MCS, TX power) - Built-in Ping Tool for connectivity testing - RSSI Calculator for quick link quality estimation - Device actions: reboot, factory reset, quick disconnect PRISM delivers fast, professional wireless management—right from your phone.
Screenshots
Verdict
The clearest difference is ads: PRISM at none against ThreeLinesDiary's shown. PRISM also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
ThreeLinesDiary ships an update every 6 months, PRISM every 4 months. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.
| Parameter | ThreeLinesDiary | PRISM |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| Update frequency | Every 6 months | Every 4 months — better |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 24 MB |
| Age rating | 4+ | 4+ |
| Developer | Seiji Nagano | ZINWELL CORPORATION |
In-app purchases
ThreeLinesDiary
No in-app purchases
PRISM
No in-app purchases
Questions
Is ThreeLinesDiary free?
Is PRISM free?
Do ThreeLinesDiary or PRISM have ads?
Which is updated more often, ThreeLinesDiary or PRISM?
Other comparisons
