SleepSign vs Foresta
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SleepSign
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SleepSign-Cloud (スリープサイン クラウド)は、研究の参加者向けのアプリです。 研究機関からの指示に従って、操作ください。 ・日々の活動量計データを読み込みクラウドへ送信・登録します. ・就床・離床時刻を登録・修正します. ※研究内容によっては登録・修正できない場合もあります. ーーーーーーー よくあるご質問 ーーーーーーー 下記のWebサイトに掲載しております。 https://support.sleepsign-cloud.jp/faq/index.html ーーーーーーー 対応機種とご注意点 ーーーーーーー ・NFC(フェリカ)を使用するため、未搭載の端末(iPhone6/6S以前、iPad)ではご利用できません。 ・インターネット接続ができない環境でのご利用はできません。
Foresta
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◆What is Foresta? When you vent your feelings in moments of stress or anxiety, a tree grows in your forest. ・Tree size = Amount of text vented ・Tree color = Positive/Negative level Visualizing your “emotional movements” allows intuitive reflection. The more you write, the more your forest grows and your heart lightens—we deliver this nurturing digital forest. ◆6 Reasons Foresta is Chosen 【Instant Logging】 Record not just once a day, but “the moment your emotions shift.” See where stress originates. 【Visualization in the Forest】 Grasp mood changes instantly through color and density—no need to scroll through text. 【Organize Emotions】 Break down your vented records into “emotion” and “cause.” Understand your emotional patterns. 【1-Minute Entry】 Just sliders + notes. In bubble mode, just type words. Super simple input you can keep up with even when busy. 【Gentle UI】 Relax with pastel trees and soft app design. Also supports dark mode. 【Complete Privacy】 Store locally on your device for peace of mind. Protect your important records with passcode or Face ID lock. ◆Main Features 【Record】 - Register, edit, delete emotion events - Choose input style: Text Mode / Bubble Mode - Select from 7 tree designs (Premium) 【Review】 - Weekly/Monthly View: See your forest at a glance by week/month - Search Filter: Instantly narrow down by keyword 【Organize】 - Link emotions to causes for organized tracking - Reuse past causes for efficient recording 【Analyze】 - Emotional balance trend graph - Visualize causes significantly impacting emotions (Premium) - Detailed analysis by emotion (Premium) - Long-term analysis up to 1 year (Premium) ◆ Recommended for you if: ・You feel tense and unable to sort out your fuzzy feelings ・You're too busy to find time to relieve stress ・You can't speak your mind on social media and want a safe place to vent ・Want to deepen self-understanding ・Want to confront your sensitive, easily hurt feelings Foresta is a place where you can freely express those feelings. Now, record your feelings as if planting trees, and let a forest grow in your heart. ◆Premium Plan Includes a 7-day free trial. Cancel anytime.
Screenshots
Verdict
The clearest difference is ads: SleepSign at none against Foresta's shown. SleepSign also leads on iOS requirement (15.5 vs 18.2). Foresta's advantage is update cadence (weekly vs monthly). On price, 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.
SleepSign ships an update monthly, Foresta weekly. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.
| Parameter | SleepSign | Foresta |
|---|---|---|
| Price | Free | Free |
| Update frequency | Monthly | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.5 — better | 18.2 |
| Further details — not scored | ||
| Size | 32 MB | 13 MB |
| Age rating | 12+ | 4+ |
| Developer | Kissei Comtec Co., Ltd. | Kaito Miura |
In-app purchases
SleepSign
No in-app purchases
Foresta
No in-app purchases









