Ebbinghaus Planner vs SOL Galaxy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ebbinghaus Planner
This app helps you memorize information efficiently by scheduling reviews based on the forgetting curve. It automates the process of recalling vocabulary, formulas, and other data at optimal times, reducing the need for manual scheduling and ensuring you never miss a review session.
- Automatic review scheduling
- Subject and item management
- Today's tasks view
- Customizable notifications
- Progress visualization
- Simple and intuitive interface
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Ebbinghaus Planner is a study management app designed to maximize memorization efficiency by guiding you to review at the optimal time based on the “forgetting curve.” It reduces the hassle of manually scheduling review intervals on your calendar and helps you recall information at the most effective moments. Main Features - Automatic Review Scheduling: Automatically generates review dates based on Ebbinghaus intervals (e.g., 1 day, 3 days, 7 days, etc.) - Subject & Item Management: Easily register, edit, and check off memorization items by subject or topic - Today’s Tasks: Quickly view all items you need to review today in one screen - Notifications: Custom reminders to make sure you never miss a review - Progress Visualization: See your growth with completion rates and cumulative review stats - Simple Interface: A minimal, intuitive design that helps you stay focused Recommended For - Learners who want to improve efficiency when memorizing basic information such as vocabulary, definitions, or formulas - Anyone who often misses the right review timing during exam preparation - Users who want to systematically maintain and manage their own memorization lists Developer’s Note I’ve personally used this app and experienced significant improvements in memory retention. If the Ebbinghaus method suits you, this planner will reduce the burden of repetition and help you retain information longer. Automate your review sessions now and remember more effectively, for longer. Terms of Service & Privacy Policy Please make sure to read the following before using the app: - Terms of Service: (https://www.notion.so/22bcda0381e9804f9bd3c0c87675f05c?source=copy_link) - Privacy Policy: (https://www.notion.so/21ccda0381e980a4937cefda3d4330a3?source=copy_link)
SOL Galaxy
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SOL Galaxy — Focus Timer A focus timer where your time powers a galaxy. Travel between planets, manage alien relations, and build your influence—one study session at a time. SOL Galaxy is a galaxy-traversing study timer game that transforms your time and focus into meaningful progress across a vast, interconnected universe. At its core, the experience blends productivity with exploration, strategy, and puzzle mechanics. Every action you take in real life—studying, working, or concentrating—generates fuel, the single most important resource in the game. Fuel is what allows you to move through space, interact with planets, send delegations, build embassies, collect resources, and expand your presence across the galaxy. By leaving the app when the timer is on, you will have 10 seconds to come back to the app or your fuel is wasted. The game is structured around long-term progression and discovery. Players are free to travel between planets, but access is not always straightforward. Many planets require specific items before you can land, while others demand specialized safety equipment such as thermal suits or dive rebreathers to survive their environments. This creates a layered puzzle system where exploration depends on preparation, planning, and resource management rather than simple progression. Each planet is inhabited by a unique species with its own disposition toward you. Some civilizations are open to your arrival, but most are resistant or hostile at first. In order to gain access to their resources, you must build relationships over time. This is done by sending delegations, which gradually improve how that species perceives you. Once relations reach a certain level, you gain the ability to establish an embassy on that planet. Embassies serve as your foothold, allowing you to collect that planet’s resources and integrate it into your expanding network. However, resource extraction is not without consequence. Taking resources lowers your standing with that species, introducing a constant strategic tension. If relations fall too low, the inhabitants may retaliate and destroy your embassy, forcing you to rebuild trust and start again. This system creates a balance between expansion and diplomacy, requiring careful decision-making at every stage. Progression in SOL Galaxy is intentionally extensive, offering over 800 hours of gameplay. There are 115 unique resources scattered across the galaxy, each tied to different planets and conditions. Fully completing the game requires visiting every planet, unlocking access through items and preparation, building relationships, and successfully collecting all available resources. The ultimate objective is to reach the Singularity. This endgame event only becomes available once all resources have been collected and every major objective has been completed. The Singularity represents the final destination of your journey, serving as both a culmination of your efforts and the conclusion of the galaxy’s progression system. SOL Galaxy is designed as more than just a timer. It is a system where productivity directly fuels exploration, where time becomes a currency, and where consistent focus leads to tangible, long-term achievement.
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Verdict
The clearest difference is in-app purchases: SOL Galaxy at none against Ebbinghaus Planner's 4. Ebbinghaus Planner's advantage is update cadence (every 10 days vs every 5 weeks). On price, ads, device support and iOS requirement 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. Ebbinghaus Planner sells 4 in-app purchases, starting at $2.99 per month. SOL Galaxy asks for nothing beyond the download.
Ebbinghaus Planner ships an update every 10 days, SOL Galaxy every 5 weeks. The most recent releases landed on October 9, 2026 and October 11, 2026 respectively.
| Parameter | Ebbinghaus Planner | SOL Galaxy |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (14 ratings) — better | — |
| Positive reviews | 95.1% of reviews | — |
| Number of ratings | 14 — better | — |
| Update frequency | Every 10 days — better | Every 5 weeks |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 39 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | SeungGi Lee | MadePure Media Corp. |
In-app purchases
Ebbinghaus Planner
- Monthly14 Days trial$2.991 Month
- Monthly$2.991 Month
- Yearly14 Days trial$19.991 Year
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- Yearly$19.991 Year
SOL Galaxy
No in-app purchases
Questions
Is Ebbinghaus Planner free?
Is SOL Galaxy free?
Do Ebbinghaus Planner or SOL Galaxy have ads?
Which is updated more often, Ebbinghaus Planner or SOL Galaxy?
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