Mochii vs Grapheme
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mochii
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Mochii™ is a new type of microscope that helps scientists, explorers, technologists, teachers, and learners see the natural world closer and more effectively than ever before. For nearly a century, powerful nano-imaging has enabled elite scientists, engineers, and researchers to understand the natural world, engineer new materials, build microchips, study implants, and develop new drugs. Mochii brings this capability to all users. Collaborators in the same room and in different countries can do more than simply share images: they can explore specimens together and analyze results in real-time! Mochii™'s wireless experience and its unique tablet-based software tools enable effortless exploration... together.
Grapheme
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Grapheme is a pocket museum of the characters the world writes with, as Unicode records them. The entire code space is laid out in one grid, grouped by block and ready to wander. A COLLECTION FULL OF SURPRISES • The complete Unicode 16 code space, organized by block • Wander from Egyptian hieroglyphs to alchemical symbols, Byzantine musical notation, mahjong tiles, and emoji • Jump to any block instantly with the block picker, and pin the ones you visit most • Even characters your device has no font for get a meaningful placeholder glyph, so nothing shows up as an empty box CHARACTER DETAILS AT A TAP Tap any cell to see everything about that character: • Official Unicode name and block • Code point in U+ notation • Byte encodings: UTF-8, UTF-16 (BE and LE), UTF-32 (BE and LE) • HTML entity FAST SEARCH • Find characters by name: try “snowman”, “dragon”, or “pile of poo” • Look up a code point directly by its hex value • Paste in any text to see the code points it breaks down into, including the ZWJ sequences inside an emoji FAVORITES • Mark characters you use often and come back to them in one tap WORKS COMPLETELY OFFLINE The full Unicode 16 character database ships inside the app. Browse, search, and inspect encodings anywhere, with no network connection required. MADE FOR DEVELOPERS, DESIGNERS, AND THE CURIOUS Debugging a text-encoding issue? Hunting for the perfect arrow, box-drawing character, or mathematical symbol? Exploring ancient scripts and the far reaches of the astral planes? Grapheme puts the entire Unicode standard at your fingertips.
Screenshots
Verdict
The clearest difference is ads: Mochii at none against Grapheme's shown. Grapheme's advantage is update cadence (every 3 days vs every 12 months). On price, in-app purchases, 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. Neither carries in-app purchases, so what you see is what you pay.
Mochii ships an update every 12 months, Grapheme every 3 days. The most recent releases landed on September 10, 2026 and September 8, 2026 respectively.
| Parameter | Mochii | Grapheme |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 12 months | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.2 — better | 18.2 |
| Further details — not scored | ||
| Size | 8 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | Christopher Own | Hsingchien Cheng |
In-app purchases
Mochii
No in-app purchases
Grapheme
No in-app purchases









