Satori Reader vs JP Number:数字
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Satori Reader
Enhance your Japanese reading and listening skills with engaging stories written by native speakers. Features adaptive kanji, smart definitions, and spaced repetition to build vocabulary. Get clarity with friendly annotations and human feedback.
- Compelling stories by native speakers
- Audio narration by voice actors
- Adaptive kanji presentation
- Smart word definitions
- Friendly annotations
- Spaced repetition vocabulary review
- Human feedback and support
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Ready to take your Japanese reading and listening comprehension to the next level? Welcome to Satori Reader. COMPELLING STORIES Read from a growing library of engrossing stories written by native speakers for intermediate students, across genres such as fantasy, slice-of-life, thrillers, documentaries, news, and more. AUDIO Tap any sentence to hear it read aloud by native voice actors (no robots!). ADAPTIVE KANJI USAGE Crack the chicken-and-egg problem of reading kanji with our unique presentation engine, which adjusts the Japanese text to accommodate your actual knowledge. This allows you to challenge yourself for the kanji you should know without being overwhelmed by what you don't. SMART DEFINITIONS Tap any word for a definition. This is more than just an automated lookup. Satori Reader shows the actual sense of each word as it's being used in the sentence. For example, the particle の has many uses: it can indicate possession; it can turn the preceding verb or phrase into a noun; it can stand in for another word; and more. We show you exactly what is happening in every instance of every word. FRIENDLY ANNOTATIONS Gray underlines indicate longer annotations that break down tricky expressions, provide cultural background, or help you to read between the lines. Our editors work hard to anticipate what might be confusing and proactively help you to make sense of things. Good-bye, confusion. Hello, clarity! SPACED REPETITION SYSTEM (SRS) The built-in spaced repetition review system helps you to build your vocabulary. Create review cards instantly as you read. Each card you create takes along a snapshot of the sentence in which you encountered the word, further helping to cement it in your memory. You can even play back the audio of that sentence while reviewing the word! HUMAN FEEDBACK Still confused about something? Just ask in the discussion section below each episode. Our team of friendly human beings is ready to help. Satori Reader is built by a team that cares. Our goal is to bring satori (enlightenment) into your Japanese reading life. Set up a free account today, and let's get started. SUBSCRIPTION DETAILS ▪ OPTIONS: Download the app for free and enjoy unlimited access to the first two episodes of each series (new series released regularly), plus complete access to special series such as Closeup: Obon Society. Subscribed for unlimited access to the entire Satori Reader library of more than 1200 episodes (new episodes released each week), including crystal-clear audio, helpful annotations, and real human feedback. Try your first month FREE (limit one per customer; cannot be used in combination with other introductory offers; offers subject to change). ▪ EXTRAS: Your subscription to Satori Reader comes with complimentary web access, as well as access to Satori Reader on all your smartphones and tablets. ▪ PRIVACY POLICY: https://www.satorireader.com/privacy ▪ TERMS OF SERVICE: https://www.satorireader.com/terms ADDITIONAL SUBSCRIPTION DETAILS ▪ Payment will be charged to your iTunes Account at confirmation of purchase (following any trial period). ▪ Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. ▪ Account will be charged for renewal within 24 hours prior to the end of the current period, and identify the cost of the renewal. ▪ 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, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. ▪ Cancel your subscription at any time. If you cancel, you will retain full access to Satori Reader for the period you paid for and you will not be billed again. If you have any questions, write to support@satorireader.com for speedy assistance. Thank you for your business!
JP Number:数字
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If you dropped by a Japanese-style restaurant in Japan, such as Izakaya (Japanese-style pub), Rio-tei (Japanese restaurant), buckwheat noodle restaurant, you would probably see price on menu that is written in Kanji (Chinese character). Then, this app would come in hoping to help you to read how much it is naturally. In the "How to use" section, the first thing to be seen when you tap [How to use] button is a list of buttons to explain the app, such as [How to draw Kanji letter?], [How to pronounce Kanji letter?], [How to build Kanji number?], [How to use FIND NUMBER button] etc. In the "Kanji number List" section, the first thing to be seen when you tap [Kanji number List] button is a list page where you can choose "Kanji number letter". Each cell of the list is composed of Five sections, such as "number", "image of Kanji number", "its number in English", "its number in Japanese" and "its number in Hiragana". The second thing to be seen when you tap one of these letter is a practice page of "Kanji letter". The third thing to be seen when you tap [Test my Kanji] button is a test your Kanji page where you can write letter without any hints. If you were comfortable with its Kanji letter, you might tap [Kanji word list] button to choose other numbers related to its Kanji letter. The last thing to be seen when you tap one of these cell is a practice page of Kanji number that is composed of more than two Kanji letters. In the "Find Number" section, the first thing to be seen when you tap [Find Number] button is a page composed with three section. On the top, there is an area of entering number. As you see, you can input a number, between 1 and 999999999, you want to know how to write using KANJI letter. On the middle, there is an area of showing a number using KANJI letters as well as how to read in English, after entering the number on the top area. On the bottom, there is a Write Number button. As you imagine, if you tap the button, you are taken to the next page where you can practice KANJI number you have just entered on the previous page. I hope that you would get used to write any KANJI number as you use this page. Well, to begin with, why don't you enter a number, such as your age or your year of birth, to be able to write in KANJI number. Enjoy writing Kanji-Number :-)
Screenshots
Verdict
The clearest difference is in-app purchases: JP Number:数字 at none against Satori Reader's 8. JP Number:数字 also leads on iOS requirement (8.0 vs 15.0). Satori Reader's advantage is ads (none vs shown) and update cadence (every 3 months vs every 19 months). On price 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. Satori Reader sells 3 in-app purchases, starting at $8.99 per month. JP Number:数字 asks for nothing beyond the download.
Satori Reader ships an update every 3 months, JP Number:数字 every 19 months. The most recent releases landed on September 29, 2026 and September 20, 2026 respectively.
| Parameter | Satori Reader | JP Number:数字 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (215 ratings) — better | — |
| Positive reviews | 90.2% of reviews | — |
| Number of ratings | 215 — better | — |
| Update frequency | Every 3 months — better | Every 19 months |
| Ads | No — better | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 79 MB | 123 MB |
| Age rating | 12+ | 4+ |
| Developer | Brak Software, Inc. | Hajime Sasaki |
Bugs and requests
Satori Reader
Reported bugs
2 issues- Login issues and account creation problems
- Syncing and loading delays on some devices
Requested features
4 requests- Dark mode option
- Ability to loop audio playback
- Kanji lookup/learning tools integration
- More advanced/diverse content selection
JP Number:数字
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Satori Reader
- Satori Reader Monthly1 Month trial4 variants$8.991 Month
- Satori Reader Annual1 Month trial$89.991 Year
- Satori Reader Annual1 Year trial3 variants$89.991 Year
JP Number:数字
No in-app purchases
Questions
Is Satori Reader free?
Is JP Number:数字 free?
Do Satori Reader or JP Number:数字 have ads?
Which is updated more often, Satori Reader or JP Number:数字?
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