We monitor 175 App Store storefronts to answer one question —

Is SigmaTunes ST-1 DSD & FLAC censored by Apple?

Gone.

SigmaTunes ST-1 DSD & FLAC is gone from every App Store storefront we test. It was last seen available on Oct 12, 2019.

1,059 tests on record·⚠ last verified 4 months ago — treat as historical

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 itLikely

    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

  • Apple applied a rule, unaskedLikely

    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

  • The developer withheld itUnlikely

    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 brokeUnlikely

    a rejected update, a lapsed certificate, a payment or licensing problem, a mistake nobody has got round to noticing.

  • A local rule about paying for itRuled out

    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 →

SigmaTunes ST-1 DSD & FLAC

Developer: PETER WAYNE · Category: Music · Released: Jan 24, 2017 · Rating: 2.9★

View in App Store ↗
0stores where available
134stores where blocked
4.67Bpeople behind the block
134of 175 stores tested
1,059tests on record

Other Music apps missing from mainland China

Everything missing from mainland China →

Life of this app

  1. Jan 24, 2017Released on the App Store
  2. Apr 7, 2019First tested by AppleCensorship
  3. Oct 12, 2019Last seen available anywhere
  4. Aug 12, 2021Gone from 134 storefronts
  5. May 19, 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.

2019-042026-05

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
AlbaniaALUnavailableApr 30, 20214 years ago
AngolaAOUnavailableJul 18, 20242 years ago
AnguillaAIUnavailableJun 9, 202215 months ago
Antigua & BarbudaAGUnavailableMay 22, 202516 months ago
ArgentinaARUnavailableNov 25, 20203 years ago
ArmeniaAMUnavailableOct 6, 20204 years ago
AustraliaAUUnavailableOct 12, 20242 years ago
AzerbaijanAZUnavailableFeb 23, 20212 years ago
BahamasBSUnavailableJun 4, 20213 years ago
BahrainBHUnavailableSep 3, 20224 years ago
BarbadosBBUnavailableOct 8, 20203 years ago
BelarusBYUnavailableDec 11, 20204 years ago
BelgiumBEUnavailableSep 10, 20202 years ago
BelizeBZUnavailableFeb 28, 20233 years ago
BeninBJUnavailableDec 16, 20202 years ago
BermudaBMUnavailableJun 23, 20242 years ago
BhutanBTUnavailableJan 2, 20242 years ago
BoliviaBOUnavailableApr 1, 20203 years ago
BrazilBRUnavailableNov 27, 20203 years ago
British Virgin IslandsVGUnavailableJun 29, 20214 years ago
BruneiBNUnavailableJun 19, 20213 years ago
Burkina FasoBFUnavailableApr 30, 20214 years ago
CambodiaKHUnavailableDec 13, 20202 years ago
Cape VerdeCVUnavailableDec 28, 20213 years ago
Cayman IslandsKYUnavailableDec 7, 20202 years ago
ChadTDUnavailableJul 27, 20213 years ago
ChileCLUnavailableMar 22, 20222 years ago
China (Mainland)CNUnavailableDec 10, 20196 months ago
Costa RicaCRUnavailableDec 16, 20202 years ago
CzechiaCZUnavailableAug 20, 20212 years ago
DominicaDMUnavailableOct 17, 20203 years ago
Dominican RepublicDOUnavailableDec 7, 20242 years ago
DR CongoCDUnavailableSep 9, 202216 months ago
EcuadorECUnavailableJul 1, 20214 years ago
El SalvadorSVUnavailableApr 28, 20214 years ago
EstoniaEEUnavailableDec 19, 20213 years ago
FijiFJUnavailableMay 29, 20214 years ago
FinlandFIUnavailableMay 12, 20214 years ago
FranceFRUnavailableDec 10, 20194 months ago
GabonGAUnavailableAug 31, 20224 years ago
GambiaGMUnavailableSep 1, 20233 years ago
GeorgiaGEUnavailableJun 27, 20242 years ago
GermanyDEUnavailableAug 27, 20213 years ago
GhanaGHUnavailableFeb 1, 20222 years ago
GreeceGRUnavailableDec 13, 20207 months ago
GrenadaGDUnavailableMay 27, 20214 years ago
GuatemalaGTUnavailableAug 13, 20212 years ago
Guinea-BissauGWUnavailableNov 11, 20202 years ago
GuyanaGYUnavailableFeb 1, 20222 years ago
HondurasHNUnavailableMay 27, 20214 years ago
Hong KongHKUnavailableJan 2, 20223 years ago
HungaryHUUnavailableJul 17, 20224 years ago
IndonesiaIDUnavailableJan 19, 20234 years ago
IraqIQUnavailableDec 3, 20237 months ago
IrelandIEUnavailableApr 20, 20222 years ago
IsraelILUnavailableOct 9, 202015 months ago
ItalyITUnavailableNov 11, 20202 years ago
JamaicaJMUnavailableDec 19, 20214 years ago
JordanJOUnavailableFeb 23, 20213 years ago
KosovoXKUnavailableNov 17, 20222 years ago
KuwaitKWUnavailableDec 17, 20204 years ago
KyrgyzstanKGUnavailableMar 3, 20214 years ago
LaosLAUnavailableSep 18, 20212 years ago
LatviaLVUnavailableJun 21, 20213 years ago
LebanonLBUnavailableJan 12, 20223 years ago
LiberiaLRUnavailableAug 13, 202513 months ago
LithuaniaLTUnavailableApr 15, 20214 years ago
LuxembourgLUUnavailableJun 13, 20227 months ago
MacaoMOUnavailableMay 22, 20214 years ago
MadagascarMGUnavailableJul 1, 20212 years ago
MalawiMWUnavailableDec 17, 20204 years ago
MalaysiaMYUnavailableMay 12, 20214 years ago
MaldivesMVUnavailableNov 25, 20222 years ago
MaliMLUnavailableJun 4, 20212 years ago
MaltaMTUnavailableJan 29, 20223 years ago
MauritaniaMRUnavailableJun 21, 20216 months ago
MauritiusMUUnavailableOct 13, 20212 years ago
MexicoMXUnavailableDec 11, 20202 years ago
MoldovaMDUnavailableNov 15, 20216 months ago
MongoliaMNUnavailableApr 15, 20214 years ago
MoroccoMAUnavailableAug 11, 20224 years ago
MozambiqueMZUnavailableJun 4, 20214 years ago
NamibiaNAUnavailableAug 12, 20217 months ago
NauruNRUnavailableJun 23, 20244 months ago
NepalNPUnavailableApr 15, 20212 years ago
NetherlandsNLUnavailableDec 6, 20213 years ago
New ZealandNZUnavailableNov 25, 20204 months ago
NicaraguaNIUnavailableMar 3, 20213 years ago
NigeriaNGUnavailableMay 12, 20213 years ago
North MacedoniaMKUnavailableMay 6, 20212 years ago
PalauPWUnavailableSep 10, 20203 years ago
PanamaPAUnavailableJun 9, 202215 months ago
Papua New GuineaPGUnavailableDec 3, 20212 years ago
PeruPEUnavailableMar 7, 20213 years ago
PhilippinesPHUnavailableNov 27, 20233 years ago
PolandPLUnavailableMay 15, 20222 years ago
QatarQAUnavailableApr 1, 20201 year ago
Republic of the CongoCGUnavailableApr 12, 20221 year ago
RomaniaROUnavailableFeb 12, 20267 months ago
RussiaRUUnavailableOct 8, 20206 months ago
RwandaRWUnavailableJul 14, 20224 years ago
São Tomé & PríncipeSTUnavailableJun 13, 20227 months ago
SenegalSNUnavailableOct 7, 20203 years ago
SerbiaRSUnavailableSep 23, 20233 years ago
Sierra LeoneSLUnavailableAug 11, 20212 years ago
SlovakiaSKUnavailableMay 24, 20242 years ago
Solomon IslandsSBUnavailableSep 9, 20224 years ago
South KoreaKRUnavailableApr 15, 20211 year ago
SpainESUnavailableJul 17, 20242 years ago
Sri LankaLKUnavailableJun 7, 20224 years ago
St. Kitts & NevisKNUnavailableFeb 1, 20229 months ago
St. LuciaLCUnavailableAug 12, 20213 years ago
St. Vincent & GrenadinesVCUnavailableAug 27, 20212 years ago
SwedenSEUnavailableDec 10, 20194 years ago
SwitzerlandCHUnavailableMay 29, 20222 years ago
TaiwanTWUnavailableDec 10, 20192 years ago
TajikistanTJUnavailableAug 30, 20224 years ago
TanzaniaTZUnavailableAug 11, 20214 years ago
ThailandTHUnavailableDec 11, 20222 years ago
TongaTOUnavailableAug 30, 20224 years ago
Trinidad & TobagoTTUnavailableJan 29, 20223 years ago
TunisiaTNUnavailableOct 17, 20202 years ago
TürkiyeTRUnavailableOct 17, 20223 years ago
TurkmenistanTMUnavailableSep 19, 20224 years ago
Turks & Caicos IslandsTCUnavailableMay 12, 20212 years ago
UgandaUGUnavailableMar 31, 20222 years ago
UkraineUAUnavailableMar 4, 20222 years ago
United Arab EmiratesAEUnavailableDec 10, 20194 months ago
United KingdomGBUnavailableDec 10, 20196 months ago
United StatesUSUnavailableDec 10, 20194 months ago
UruguayUYUnavailableJun 14, 20242 years ago
UzbekistanUZUnavailableMay 25, 20213 years ago
YemenYEUnavailableJul 14, 20224 years ago
ZimbabweZWUnavailableOct 6, 20204 years ago
AfghanistanAFNot tested0
AlgeriaDZNot tested0
AustriaATNot tested0
Bosnia & HerzegovinaBANot tested0
BotswanaBWNot tested0
BulgariaBGNot tested0
CameroonCMNot tested0
CanadaCANot tested0
ColombiaCONot tested0
Côte d’IvoireCINot tested0
CroatiaHRNot tested0
CyprusCYNot tested0
DenmarkDKNot tested0
EgyptEGNot tested0
EswatiniSZNot tested0
IcelandISNot tested0
IndiaINNot tested0
JapanJPNot tested0
KazakhstanKZNot tested0
KenyaKENot tested0
LibyaLYNot tested0
MicronesiaFMNot tested0
MontenegroMENot tested0
MontserratMSNot tested0
Myanmar (Burma)MMNot tested0
NigerNENot tested0
NorwayNONot tested0
OmanOMNot tested0
PakistanPKNot tested0
ParaguayPYNot tested0
PortugalPTNot tested0
Saudi ArabiaSANot tested0
SeychellesSCNot tested0
SingaporeSGNot tested0
SloveniaSINot tested0
South AfricaZANot tested0
SurinameSRNot tested0
VanuatuVUNot tested0
VenezuelaVENot tested0
VietnamVNNot tested0
ZambiaZMNot tested0

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.