We monitor 175 App Store storefronts to answer one question —
Is Quartz Masters censored by Apple?
Quartz Masters is gone from every App Store storefront we test. It was last seen available on Jan 11, 2020.
862 tests on record·last checked 32 days ago
Why it is unavailable
Five things can put an app out of one App Store. Each is weighed below against what can be seen from outside — open a card for the reasoning.
A government or a court demanded it
and Apple complied. Apple publishes a count of these per country each year and never says which apps they were. Apple's 2025 App Store Transparency Report
- Reference apps in the United States are unavailable at 2%, near the 5% for everything there, which cuts neither way.
- 4 other apps left Hong Kong the same day, Jan 2, 2022.
- Apple reports 1,213 government-ordered removals in Russia for 2025, naming none of them.
Apple applied a rule, unasked
either its own review guidelines, or its own reading of a local law, with nobody having demanded anything. This is the largest category in Apple's own removal figures by a wide margin, and it covers distribution permits as well as content — Apple kept a free Bible app out of mainland China in 2021 for want of one. Apple's 2025 App Store Transparency Report
- Reference apps in the United States are unavailable at 2%, near the 5% for everything there, which cuts neither way.
- 4 other apps left Hong Kong the same day, Jan 2, 2022.
The developer withheld it
freely, or under legal advice of their own, or because Apple's guidelines require that kind of app to be limited to certain countries. Switching a country off is easy for a developer to do in Apple's own tools: it needs no new version of the app, and it leaves no public trace other than the app being unavailable.
Something broke
a rejected update, a lapsed certificate, a payment or licensing problem, a mistake nobody has got round to noticing.
- 4 other apps left Hong Kong the same day, Jan 2, 2022.
- Gone for 6 years.
A local rule about paying for it
gambling licences, financial rules, tax — the kind of law that governs a transaction. Apple can obey every one of them by refusing the payment, which is why this is the only restriction we would accept and the only one that cannot touch a free app.
- It is free, so Apple sells nothing here.
How this is weighed, and what it cannot tell you
Weighed from the evidence under each card, not from a model. There is no published figure for how Apple's removals divide up, so these are ordered words rather than percentages. For scale on the same-day counts: across the whole record an app leaves a storefront with fewer than two others, so a dozen at once is not a dozen coincidences.
None of this is certain, and a citation does not make it so: Apple naming a Chinese agency tells you what Apple said, not everything that happened. What can be said is that the readings alone cannot separate these five — a developer switching off a country and a government ordering it removed arrive at Apple's catalogue looking identical — and that nobody has ever measured how they divide across the App Store. The one careful study of the question was done on Google's store, using an error message Apple does not emit.
Apple publishes no record of which apps are unavailable in which of its App Stores. For the removals it makes on a government's demand it publishes the agency and the law behind every one — 2,045 of the 166,899 apps it removed during 2025 — and never which app. Where a reason reaches the public at all, it is usually because a developer chose to say so. Apple's App Store Transparency Report
Know of a statement, notice or order we have missed? Tell us →
Quartz Masters
Developer: Dean Lazarof · Category: Reference · Released: Jan 5, 2018 · Rating: 5.0★
Other Reference apps missing from mainland China
Life of this app
- Jan 5, 2018Released on the App Store
- Oct 10, 2019First tested by AppleCensorship
- Jan 11, 2020Last seen available anywhere
- Oct 31, 2021Gone from 119 storefronts
- Aug 18, 2026Most recent test
Testing history
One column per month, every month from the first reading to the last. Height follows how many readings we took that month; red is the share of them that found the app unavailable. An empty month is one nobody tested.
Found availableFound unavailable
Availability by storefront
Every storefront we test, current status first. Data is a measurement, not a promise: each row carries its own date.
| Test now | |||||
|---|---|---|---|---|---|
| AlbaniaAL | Unavailable | May 26, 2021 | 7 months ago | ||
| Antigua & BarbudaAG | Unavailable | Nov 7, 2020 | 3 years ago | ||
| ArmeniaAM | Unavailable | Mar 7, 2021 | 3 years ago | ||
| AustriaAT | Unavailable | Jun 9, 2021 | 2 years ago | ||
| BahamasBS | Unavailable | Nov 29, 2022 | 4 years ago | ||
| BarbadosBB | Unavailable | Feb 17, 2023 | 4 years ago | ||
| BelgiumBE | Unavailable | Oct 9, 2022 | 11 months ago | ||
| BelizeBZ | Unavailable | Nov 13, 2020 | 16 months ago | ||
| BeninBJ | Unavailable | Apr 27, 2023 | 32 days ago | ||
| BermudaBM | Unavailable | Mar 25, 2021 | 4 years ago | ||
| BhutanBT | Unavailable | May 18, 2020 | 4 months ago | ||
| BoliviaBO | Unavailable | Aug 31, 2021 | 2 years ago | ||
| Bosnia & HerzegovinaBA | Unavailable | Nov 29, 2022 | 4 years ago | ||
| BotswanaBW | Unavailable | Aug 26, 2022 | 4 years ago | ||
| BulgariaBG | Unavailable | Dec 2, 2021 | 3 years ago | ||
| Burkina FasoBF | Unavailable | Apr 6, 2023 | 3 years ago | ||
| CambodiaKH | Unavailable | Jul 22, 2022 | 4 years ago | ||
| CameroonCM | Unavailable | Oct 29, 2022 | 4 years ago | ||
| Cape VerdeCV | Unavailable | Aug 31, 2021 | 5 months ago | ||
| Cayman IslandsKY | Unavailable | Oct 1, 2023 | 3 years ago | ||
| ChadTD | Unavailable | Jan 24, 2022 | 3 years ago | ||
| ChileCL | Unavailable | Mar 22, 2022 | 3 years ago | ||
| China (Mainland)CN | Unavailable | May 18, 2020 | 32 days ago | ||
| Costa RicaCR | Unavailable | Apr 27, 2021 | 3 years ago | ||
| CroatiaHR | Unavailable | Aug 17, 2022 | 4 years ago | ||
| CyprusCY | Unavailable | Apr 19, 2021 | 3 years ago | ||
| CzechiaCZ | Unavailable | Mar 12, 2021 | 4 years ago | ||
| DenmarkDK | Unavailable | Feb 13, 2026 | 7 months ago | ||
| DominicaDM | Unavailable | Dec 11, 2020 | 2 years ago | ||
| Dominican RepublicDO | Unavailable | Aug 27, 2022 | 2 years ago | ||
| DR CongoCD | Unavailable | Jun 22, 2022 | 4 years ago | ||
| EcuadorEC | Unavailable | Nov 13, 2020 | 2 years ago | ||
| EstoniaEE | Unavailable | Sep 17, 2021 | 3 years ago | ||
| FijiFJ | Unavailable | Sep 2, 2021 | 2 years ago | ||
| FinlandFI | Unavailable | May 18, 2020 | 2 years ago | ||
| GabonGA | Unavailable | Aug 27, 2022 | 4 years ago | ||
| GambiaGM | Unavailable | May 26, 2024 | 2 years ago | ||
| GhanaGH | Unavailable | Jun 17, 2021 | 2 years ago | ||
| GreeceGR | Unavailable | Dec 13, 2020 | 4 years ago | ||
| GrenadaGD | Unavailable | Apr 9, 2021 | 2 years ago | ||
| GuatemalaGT | Unavailable | Feb 19, 2022 | 2 years ago | ||
| GuyanaGY | Unavailable | Apr 19, 2021 | 2 years ago | ||
| HondurasHN | Unavailable | May 18, 2020 | 7 months ago | ||
| Hong KongHK | Unavailable | Jan 2, 2022 | 3 years ago | ||
| HungaryHU | Unavailable | Apr 25, 2022 | 2 years ago | ||
| IrelandIE | Unavailable | Apr 18, 2023 | 3 years ago | ||
| ItalyIT | Unavailable | Apr 12, 2024 | 2 years ago | ||
| JamaicaJM | Unavailable | May 8, 2023 | 3 years ago | ||
| JapanJP | Unavailable | Apr 25, 2025 | 9 months ago | ||
| JordanJO | Unavailable | Mar 12, 2021 | 3 years ago | ||
| KazakhstanKZ | Unavailable | Mar 7, 2021 | 3 years ago | ||
| KenyaKE | Unavailable | May 12, 2021 | 2 years ago | ||
| KosovoXK | Unavailable | Nov 21, 2022 | 4 years ago | ||
| KuwaitKW | Unavailable | Aug 15, 2021 | 3 years ago | ||
| LaosLA | Unavailable | May 30, 2021 | 7 months ago | ||
| LatviaLV | Unavailable | Mar 25, 2021 | 4 years ago | ||
| LiberiaLR | Unavailable | May 30, 2021 | 2 years ago | ||
| LibyaLY | Unavailable | Apr 19, 2026 | 5 months ago | ||
| LuxembourgLU | Unavailable | Jun 18, 2022 | 3 years ago | ||
| MadagascarMG | Unavailable | Jun 17, 2021 | 4 years ago | ||
| MalawiMW | Unavailable | Nov 29, 2020 | 2 years ago | ||
| MaltaMT | Unavailable | Jun 22, 2021 | 4 years ago | ||
| MauritaniaMR | Unavailable | Apr 9, 2021 | 3 years ago | ||
| MexicoMX | Unavailable | May 18, 2020 | 3 years ago | ||
| MicronesiaFM | Unavailable | Dec 8, 2022 | 4 years ago | ||
| MoldovaMD | Unavailable | Sep 2, 2021 | 2 years ago | ||
| MongoliaMN | Unavailable | Feb 1, 2025 | 3 months ago | ||
| MontenegroME | Unavailable | Jun 14, 2024 | 2 years ago | ||
| MontserratMS | Unavailable | Apr 27, 2021 | 4 years ago | ||
| MoroccoMA | Unavailable | Sep 7, 2022 | 4 years ago | ||
| MozambiqueMZ | Unavailable | Dec 24, 2021 | 4 years ago | ||
| NamibiaNA | Unavailable | May 16, 2021 | 2 years ago | ||
| NauruNR | Unavailable | Aug 3, 2024 | 32 days ago | ||
| NepalNP | Unavailable | May 12, 2021 | 2 years ago | ||
| NicaraguaNI | Unavailable | Nov 19, 2021 | 3 years ago | ||
| NigerNE | Unavailable | Jun 9, 2021 | 7 months ago | ||
| NigeriaNG | Unavailable | Mar 6, 2021 | 3 years ago | ||
| North MacedoniaMK | Unavailable | Jun 1, 2022 | 4 years ago | ||
| OmanOM | Unavailable | Nov 7, 2020 | 3 years ago | ||
| PanamaPA | Unavailable | Aug 4, 2022 | 2 years ago | ||
| ParaguayPY | Unavailable | Jun 28, 2021 | 4 years ago | ||
| PeruPE | Unavailable | Apr 21, 2021 | 3 years ago | ||
| PolandPL | Unavailable | May 26, 2021 | 4 years ago | ||
| PortugalPT | Unavailable | Jan 10, 2025 | 2 years ago | ||
| Republic of the CongoCG | Unavailable | May 16, 2021 | 4 years ago | ||
| RomaniaRO | Unavailable | Jul 7, 2025 | 14 months ago | ||
| RussiaRU | Unavailable | Jun 9, 2021 | 2 years ago | ||
| RwandaRW | Unavailable | Jul 22, 2022 | 4 years ago | ||
| Saudi ArabiaSA | Unavailable | Jan 28, 2024 | 3 years ago | ||
| Sierra LeoneSL | Unavailable | Feb 27, 2022 | 2 years ago | ||
| SingaporeSG | Unavailable | Mar 25, 2024 | 2 years ago | ||
| SlovakiaSK | Unavailable | Jun 22, 2022 | 4 years ago | ||
| SloveniaSI | Unavailable | Dec 11, 2020 | 2 years ago | ||
| Solomon IslandsSB | Unavailable | Apr 28, 2022 | 3 years ago | ||
| South KoreaKR | Unavailable | Aug 30, 2023 | 3 years ago | ||
| SpainES | Unavailable | Oct 15, 2020 | 3 years ago | ||
| St. Kitts & NevisKN | Unavailable | Aug 11, 2024 | 2 years ago | ||
| St. LuciaLC | Unavailable | Jan 9, 2022 | 3 years ago | ||
| St. Vincent & GrenadinesVC | Unavailable | Aug 15, 2021 | 2 years ago | ||
| SurinameSR | Unavailable | Feb 27, 2022 | 2 years ago | ||
| SwedenSE | Unavailable | Mar 6, 2021 | 7 months ago | ||
| TaiwanTW | Unavailable | Nov 9, 2020 | 2 years ago | ||
| TajikistanTJ | Unavailable | Jun 12, 2022 | 7 months ago | ||
| TanzaniaTZ | Unavailable | Jan 24, 2022 | 2 years ago | ||
| ThailandTH | Unavailable | Apr 9, 2021 | 4 years ago | ||
| TongaTO | Unavailable | Jul 15, 2022 | 2 years ago | ||
| Trinidad & TobagoTT | Unavailable | Oct 31, 2021 | 2 years ago | ||
| TunisiaTN | Unavailable | Nov 9, 2020 | 2 years ago | ||
| TürkiyeTR | Unavailable | Dec 11, 2020 | 4 months ago | ||
| Turks & Caicos IslandsTC | Unavailable | Jan 9, 2022 | 4 years ago | ||
| UgandaUG | Unavailable | Jun 22, 2021 | 4 years ago | ||
| UkraineUA | Unavailable | Mar 22, 2022 | 2 years ago | ||
| United Arab EmiratesAE | Unavailable | Dec 3, 2022 | 32 days ago | ||
| United KingdomGB | Unavailable | May 17, 2024 | 2 years ago | ||
| United StatesUS | Unavailable | May 18, 2020 | 32 days ago | ||
| VenezuelaVE | Unavailable | Dec 2, 2021 | 3 years ago | ||
| YemenYE | Unavailable | Nov 29, 2020 | 2 years ago | ||
| ZambiaZM | Unavailable | Dec 1, 2022 | 4 years ago | ||
| ZimbabweZW | Unavailable | Oct 15, 2020 | 3 years ago | ||
| AfghanistanAF | Not tested | — | — | 0 | |
| AlgeriaDZ | Not tested | — | — | 0 | |
| AngolaAO | Not tested | — | — | 0 | |
| AnguillaAI | Not tested | — | — | 0 | |
| ArgentinaAR | Not tested | — | — | 0 | |
| AustraliaAU | Not tested | — | — | 0 | |
| AzerbaijanAZ | Not tested | — | — | 0 | |
| BahrainBH | Not tested | — | — | 0 | |
| BelarusBY | Not tested | — | — | 0 | |
| BrazilBR | Not tested | — | — | 0 | |
| British Virgin IslandsVG | Not tested | — | — | 0 | |
| BruneiBN | Not tested | — | — | 0 | |
| CanadaCA | Not tested | — | — | 0 | |
| ColombiaCO | Not tested | — | — | 0 | |
| Côte d’IvoireCI | Not tested | — | — | 0 | |
| EgyptEG | Not tested | — | — | 0 | |
| El SalvadorSV | Not tested | — | — | 0 | |
| EswatiniSZ | Not tested | — | — | 0 | |
| FranceFR | Not tested | — | — | 0 | |
| GeorgiaGE | Not tested | — | — | 0 | |
| GermanyDE | Not tested | — | — | 0 | |
| Guinea-BissauGW | Not tested | — | — | 0 | |
| IcelandIS | Not tested | — | — | 0 | |
| IndiaIN | Not tested | — | — | 0 | |
| IndonesiaID | Not tested | — | — | 0 | |
| IraqIQ | Not tested | — | — | 0 | |
| IsraelIL | Not tested | — | — | 0 | |
| KyrgyzstanKG | Not tested | — | — | 0 | |
| LebanonLB | Not tested | — | — | 0 | |
| LithuaniaLT | Not tested | — | — | 0 | |
| MacaoMO | Not tested | — | — | 0 | |
| MalaysiaMY | Not tested | — | — | 0 | |
| MaldivesMV | Not tested | — | — | 0 | |
| MaliML | Not tested | — | — | 0 | |
| MauritiusMU | Not tested | — | — | 0 | |
| Myanmar (Burma)MM | Not tested | — | — | 0 | |
| NetherlandsNL | Not tested | — | — | 0 | |
| New ZealandNZ | Not tested | — | — | 0 | |
| NorwayNO | Not tested | — | — | 0 | |
| PakistanPK | Not tested | — | — | 0 | |
| PalauPW | Not tested | — | — | 0 | |
| Papua New GuineaPG | Not tested | — | — | 0 | |
| PhilippinesPH | Not tested | — | — | 0 | |
| QatarQA | Not tested | — | — | 0 | |
| São Tomé & PríncipeST | Not tested | — | — | 0 | |
| SenegalSN | Not tested | — | — | 0 | |
| SerbiaRS | Not tested | — | — | 0 | |
| SeychellesSC | Not tested | — | — | 0 | |
| South AfricaZA | Not tested | — | — | 0 | |
| Sri LankaLK | Not tested | — | — | 0 | |
| SwitzerlandCH | Not tested | — | — | 0 | |
| TurkmenistanTM | Not tested | — | — | 0 | |
| UruguayUY | Not tested | — | — | 0 | |
| UzbekistanUZ | Not tested | — | — | 0 | |
| VanuatuVU | Not tested | — | — | 0 | |
| VietnamVN | Not tested | — | — | 0 |
Testing asks Apple whether it will sell this app in that storefront, right now, by the same method the crawler has used since 2019. Your browser asks Apple directly, so the answer describes what Apple serves your connection — and if your browser cannot reach Apple at all, we ask on your behalf and say so. The result is a link: open it to see Apple's own answer and check ours. Readings are added to the record above; roughly a quarter of the readings taken each day come from people testing.
How we test
Availability is checked against Apple's own catalog servers for every storefront, the same way the App Store app asks. "Unavailable" means Apple's servers say the app cannot be offered in that country — it does not say who asked for the removal. Removals initiated by the developer and removals demanded by governments look the same from outside; the history and context on this page are how we tell them apart.