diff --git a/lib/application/bloc.dart b/lib/application/bloc.dart
index 81ed67a1e..bd7a14396 100644
--- a/lib/application/bloc.dart
+++ b/lib/application/bloc.dart
@@ -10,6 +10,7 @@ export 'main/main_bloc.dart';
 export 'main_tab/main_tab_bloc.dart';
 export 'materials/materials_bloc.dart';
 export 'settings/settings_bloc.dart';
+export 'tierlist/tier_list_bloc.dart';
 export 'url_page/url_page_bloc.dart';
 export 'weapon/weapon_bloc.dart';
 export 'weapons/weapons_bloc.dart';
diff --git a/lib/application/tierlist/tier_list_bloc.dart b/lib/application/tierlist/tier_list_bloc.dart
new file mode 100644
index 000000000..a1a70b962
--- /dev/null
+++ b/lib/application/tierlist/tier_list_bloc.dart
@@ -0,0 +1,153 @@
+import 'dart:async';
+
+import 'package:bloc/bloc.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:genshindb/domain/models/models.dart';
+import 'package:genshindb/domain/services/genshin_service.dart';
+import 'package:genshindb/domain/services/telemetry_service.dart';
+import 'package:meta/meta.dart';
+
+part 'tier_list_bloc.freezed.dart';
+part 'tier_list_event.dart';
+part 'tier_list_state.dart';
+
+class TierListBloc extends Bloc<TierListEvent, TierListState> {
+  final GenshinService _genshinService;
+  final TelemetryService _telemetryService;
+  final List<int> defaultColors = [
+    0xfff44336,
+    0xffff9800,
+    0xffffc107,
+    0xffffeb3b,
+    0xff8bc34a,
+  ];
+
+  _LoadedState get currentState => state as _LoadedState;
+
+  TierListBloc(this._genshinService, this._telemetryService) : super(const TierListState.loading());
+
+  @override
+  Stream<TierListState> mapEventToState(TierListEvent event) async* {
+    if (event is _Init) {
+      yield const TierListState.loading();
+    }
+
+    final s = await event.map(
+      init: (_) async => _init(),
+      rowTextChanged: (e) async => _rowTextChanged(e.index, e.newValue),
+      rowPositionChanged: (e) async => _rowPositionChanged(e.index, e.newIndex),
+      rowColorChanged: (e) async => _rowColorChanged(e.index, e.newColor),
+      addNewRow: (e) async => _addNewRow(e.index, e.above),
+      deleteRow: (e) async => _deleteRow(e.index),
+      clearRow: (e) async => _clearRow(e.index),
+      clearAllRows: (_) async => _clearAllRows(),
+      addCharacterToRow: (e) async => _addCharacterToRow(e.index, e.charImg),
+      deleteCharacterFromRow: (e) async => _deleteCharacterFromRow(e.index, e.charImg),
+      readyToSave: (e) async => currentState.copyWith.call(readyToSave: e.ready),
+    );
+
+    yield s;
+  }
+
+  Future<TierListState> _init() async {
+    await _telemetryService.trackTierListOpened();
+    final defaultTierList = _genshinService.getDefaultCharacterTierList(defaultColors);
+    return TierListState.loaded(rows: defaultTierList, charsAvailable: [], readyToSave: false);
+  }
+
+  TierListState _rowTextChanged(int index, String newValue) {
+    final updated = currentState.rows.elementAt(index).copyWith.call(tierText: newValue);
+    final rows = _updateRows(updated, index, index);
+    return currentState.copyWith.call(rows: rows);
+  }
+
+  TierListState _rowPositionChanged(int index, int newIndex) {
+    final updated = currentState.rows.elementAt(index);
+    final rows = _updateRows(updated, newIndex, index);
+    return currentState.copyWith.call(rows: rows);
+  }
+
+  TierListState _rowColorChanged(int index, int newColor) {
+    final updated = currentState.rows.elementAt(index).copyWith.call(tierColor: newColor);
+    final rows = _updateRows(updated, index, index);
+    return currentState.copyWith.call(rows: rows);
+  }
+
+  TierListState _addNewRow(int index, bool above) {
+    final colorsCopy = [...defaultColors];
+    final color = (colorsCopy..shuffle()).first;
+    final newIndex = above ? index : index + 1;
+
+    final newRow = TierListRowModel.row(tierText: (currentState.rows.length + 1).toString(), tierColor: color, charImgs: []);
+    final rows = [...currentState.rows];
+    rows.insert(newIndex, newRow);
+    return currentState.copyWith.call(rows: rows);
+  }
+
+  TierListState _deleteRow(int index) {
+    if (currentState.rows.length == 1) {
+      return currentState;
+    }
+    final rows = [...currentState.rows];
+    final row = rows.elementAt(index);
+    final chars = _updateAvailableChars([...currentState.charsAvailable, ...row.charImgs], []);
+    rows.removeAt(index);
+    return currentState.copyWith.call(rows: rows, charsAvailable: chars);
+  }
+
+  TierListState _clearRow(int index) {
+    final row = currentState.rows.elementAt(index);
+    final updated = row.copyWith.call(charImgs: []);
+    final rows = _updateRows(updated, index, index);
+    final chars = _updateAvailableChars([...currentState.charsAvailable, ...row.charImgs], []);
+    return currentState.copyWith.call(rows: rows, charsAvailable: chars);
+  }
+
+  TierListState _clearAllRows() {
+    final chars = _updateAvailableChars(_genshinService.getDefaultCharacterTierList(defaultColors).expand((row) => row.charImgs).toList(), []);
+    final updatedRows = currentState.rows.map((row) => row.copyWith.call(charImgs: [])).toList();
+    return currentState.copyWith.call(rows: updatedRows, charsAvailable: chars, readyToSave: false);
+  }
+
+  TierListState _addCharacterToRow(int index, String charImg) {
+    final row = currentState.rows.elementAt(index);
+    final updated = row.copyWith.call(charImgs: [...row.charImgs, charImg]);
+    final updatedChars = _updateAvailableChars(currentState.charsAvailable, [charImg]);
+    return currentState.copyWith.call(rows: _updateRows(updated, index, index), charsAvailable: updatedChars);
+  }
+
+  TierListState _deleteCharacterFromRow(int index, String charImg) {
+    final row = currentState.rows.elementAt(index);
+    final updated = row.copyWith.call(charImgs: row.charImgs.where((img) => img != charImg).toList());
+    final updatedChars = _updateAvailableChars([...currentState.charsAvailable, charImg], []);
+    return currentState.copyWith.call(rows: _updateRows(updated, index, index), charsAvailable: updatedChars, readyToSave: false);
+  }
+
+  List<TierListRowModel> _updateRows(TierListRowModel updated, int newIndex, int excludeIndex) {
+    final rows = <TierListRowModel>[];
+
+    if (newIndex < 0 || newIndex == currentState.rows.length) {
+      return currentState.rows;
+    }
+
+    for (int i = 0; i < currentState.rows.length; i++) {
+      if (i == excludeIndex) {
+        continue;
+      }
+      final row = currentState.rows[i];
+      rows.add(row);
+    }
+
+    rows.insert(newIndex, updated);
+// rows.sort((x, y) => x.index - y.index);
+    return rows;
+  }
+
+  List<String> _updateAvailableChars(List<String> from, List<String> exclude) {
+    var chars = from;
+    if (exclude.isNotEmpty) {
+      chars = chars.where((img) => !exclude.contains(img)).toList();
+    }
+    return chars..sort((x, y) => x.compareTo(y));
+  }
+}
diff --git a/lib/application/tierlist/tier_list_event.dart b/lib/application/tierlist/tier_list_event.dart
new file mode 100644
index 000000000..921fd23d1
--- /dev/null
+++ b/lib/application/tierlist/tier_list_event.dart
@@ -0,0 +1,48 @@
+part of 'tier_list_bloc.dart';
+
+@freezed
+abstract class TierListEvent with _$TierListEvent {
+  const factory TierListEvent.init() = _Init;
+
+  const factory TierListEvent.rowTextChanged({
+    @required int index,
+    @required String newValue,
+  }) = _RowTextChanged;
+
+  const factory TierListEvent.rowPositionChanged({
+    @required int index,
+    @required int newIndex,
+  }) = _RowPositionChanged;
+
+  const factory TierListEvent.rowColorChanged({
+    @required int index,
+    @required int newColor,
+  }) = _RowColorChanged;
+
+  const factory TierListEvent.addNewRow({
+    @required int index,
+    @required bool above,
+  }) = _AddRow;
+
+  const factory TierListEvent.deleteRow({
+    @required int index,
+  }) = _DeleteRow;
+
+  const factory TierListEvent.clearRow({
+    @required int index,
+  }) = _ClearRow;
+
+  const factory TierListEvent.clearAllRows() = _ClearAllRows;
+
+  const factory TierListEvent.addCharacterToRow({
+    @required int index,
+    @required String charImg,
+  }) = _AddCharacterToRow;
+
+  const factory TierListEvent.deleteCharacterFromRow({
+    @required int index,
+    @required String charImg,
+  }) = _DeleteCharacterFromRow;
+
+  const factory TierListEvent.readyToSave({@required bool ready}) = _ReadyToSave;
+}
diff --git a/lib/application/tierlist/tier_list_state.dart b/lib/application/tierlist/tier_list_state.dart
new file mode 100644
index 000000000..aaceb65f7
--- /dev/null
+++ b/lib/application/tierlist/tier_list_state.dart
@@ -0,0 +1,12 @@
+part of 'tier_list_bloc.dart';
+
+@freezed
+abstract class TierListState with _$TierListState {
+  const factory TierListState.loading() = _LoadingState;
+
+  const factory TierListState.loaded({
+    @required List<TierListRowModel> rows,
+    @required List<String> charsAvailable,
+    @required bool readyToSave,
+  }) = _LoadedState;
+}
diff --git a/lib/domain/models/db/characters/character_file_model.dart b/lib/domain/models/db/characters/character_file_model.dart
index 34b94b320..44f602950 100644
--- a/lib/domain/models/db/characters/character_file_model.dart
+++ b/lib/domain/models/db/characters/character_file_model.dart
@@ -29,6 +29,7 @@ abstract class CharacterFileModel implements _$CharacterFileModel {
     @required bool isComingSoon,
     @required bool isNew,
     @required CharacterType role,
+    @required String tier,
     String birthday,
     @required List<CharacterFileAscensionMaterialModel> ascensionMaterials,
     @required List<CharacterFileTalentAscensionMaterialModel> talentAscensionMaterials,
diff --git a/lib/domain/models/models.dart b/lib/domain/models/models.dart
index f80579a0f..3c49336a1 100644
--- a/lib/domain/models/models.dart
+++ b/lib/domain/models/models.dart
@@ -33,5 +33,6 @@ export 'home/today_weapon_ascension_material_model.dart';
 export 'items/item_ascension_material_model.dart';
 export 'language_model.dart';
 export 'settings/app_settings.dart';
+export 'tierlist/tierlist_row_model.dart';
 export 'weapons/weapon_card_model.dart';
 export 'weapons/weapon_file_refinement_model.dart';
diff --git a/lib/domain/models/tierlist/tierlist_row_model.dart b/lib/domain/models/tierlist/tierlist_row_model.dart
new file mode 100644
index 000000000..50f813ff5
--- /dev/null
+++ b/lib/domain/models/tierlist/tierlist_row_model.dart
@@ -0,0 +1,12 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'tierlist_row_model.freezed.dart';
+
+@freezed
+abstract class TierListRowModel with _$TierListRowModel {
+  factory TierListRowModel.row({
+    String tierText,
+    int tierColor,
+    List<String> charImgs,
+  }) = _Row;
+}
diff --git a/lib/domain/services/genshin_service.dart b/lib/domain/services/genshin_service.dart
index bfcad8659..3beb7f368 100644
--- a/lib/domain/services/genshin_service.dart
+++ b/lib/domain/services/genshin_service.dart
@@ -14,6 +14,7 @@ abstract class GenshinService {
   CharacterFileModel getCharacter(String key);
   CharacterFileModel getCharacterByImg(String img);
   List<CharacterFileModel> getCharactersForBirthday(DateTime date);
+  List<TierListRowModel> getDefaultCharacterTierList(List<int> colors);
 
   List<WeaponCardModel> getWeaponsForCard();
   WeaponCardModel getWeaponForCardByImg(String image);
diff --git a/lib/domain/services/telemetry_service.dart b/lib/domain/services/telemetry_service.dart
index 1c916ba13..32cb407cc 100644
--- a/lib/domain/services/telemetry_service.dart
+++ b/lib/domain/services/telemetry_service.dart
@@ -23,4 +23,6 @@ abstract class TelemetryService {
   Future<void> trackUrlOpened(bool loadMap, bool loadWishSimulator, bool networkAvailable);
 
   Future<void> trackCalculatorItemAscMaterialLoaded(String item);
+
+  Future<void> trackTierListOpened();
 }
diff --git a/lib/infrastructure/genshin_service.dart b/lib/infrastructure/genshin_service.dart
index 5471aea1f..7e2738e79 100644
--- a/lib/infrastructure/genshin_service.dart
+++ b/lib/infrastructure/genshin_service.dart
@@ -130,6 +130,40 @@ class GenshinServiceImpl implements GenshinService {
     }).toList();
   }
 
+  @override
+  List<TierListRowModel> getDefaultCharacterTierList(List<int> colors) {
+    assert(colors.length == 5);
+
+    final sTier = _charactersFile.characters
+        .where((char) => !char.isComingSoon && char.tier == 's')
+        .map((char) => Assets.getCharacterPath(char.image))
+        .toList();
+    final aTier = _charactersFile.characters
+        .where((char) => !char.isComingSoon && char.tier == 'a')
+        .map((char) => Assets.getCharacterPath(char.image))
+        .toList();
+    final bTier = _charactersFile.characters
+        .where((char) => !char.isComingSoon && char.tier == 'b')
+        .map((char) => Assets.getCharacterPath(char.image))
+        .toList();
+    final cTier = _charactersFile.characters
+        .where((char) => !char.isComingSoon && char.tier == 'c')
+        .map((char) => Assets.getCharacterPath(char.image))
+        .toList();
+    final dTier = _charactersFile.characters
+        .where((char) => !char.isComingSoon && char.tier == 'd')
+        .map((char) => Assets.getCharacterPath(char.image))
+        .toList();
+
+    return <TierListRowModel>[
+      TierListRowModel.row(tierText: 'S', tierColor: colors.first, charImgs: sTier),
+      TierListRowModel.row(tierText: 'A', tierColor: colors[1], charImgs: aTier),
+      TierListRowModel.row(tierText: 'B', tierColor: colors[2], charImgs: bTier),
+      TierListRowModel.row(tierText: 'C', tierColor: colors[3], charImgs: cTier),
+      TierListRowModel.row(tierText: 'D', tierColor: colors.last, charImgs: dTier),
+    ];
+  }
+
   @override
   List<WeaponCardModel> getWeaponsForCard() {
     return _weaponsFile.weapons.map(
diff --git a/lib/infrastructure/telemetry/telemetry_service.dart b/lib/infrastructure/telemetry/telemetry_service.dart
index 8b4b085a2..b66bdd5e1 100644
--- a/lib/infrastructure/telemetry/telemetry_service.dart
+++ b/lib/infrastructure/telemetry/telemetry_service.dart
@@ -70,4 +70,9 @@ class TelemetryServiceImpl implements TelemetryService {
       'Name': item,
     });
   }
+
+  @override
+  Future<void> trackTierListOpened() async {
+    await trackEventAsync('TierList-Opened');
+  }
 }