OS Simulator
Version
Date (approx)
SDK
Notes

0.9.4
2023-03-30
4.32/5.0/6.1
all versions, as of
2022-02-20




Requires manual Certificate installation
since
2021-04-11 approx

0.9.2

4.31/5.0/6.0


0.9.1
2021-07-20
4.3/5.0/6.0


0.9.0
2021-04-21
4.2/5.0


0.8.3
2020-09-10
4.0/5.0


0.8.2
2020-06-24



0.7.1
2019-05-29














Derived from the supplied table

SDK 1.0










SDK 1.2
Fitbit OS 1.2   - x.31.1.29








SDK 2.0
Fitbit OS 2.0   - x.32.4.19








SDK 2.1
Fitbit OS 2.1   - x.32.10.15








SDK 2.1.1
Fitbit OS 2.1.1 - x.32.10.20








SDK 2.2
Fitbit OS 2.2   - x.32.12.19 2018-10-05







SDK 3.0
Fitbit OS 3.0   - x.33.1.30 2018-12-17







SDK 3.1
Fitbit OS 3.1   - x.33.1.30 2019-03-18







SDK 4.0
Fitbit OS 4.0   - x.68.9.15 2019-10-29







SDK 4.1
Fitbit OS 4.1   - x.70.7.14 2019-12-19







SDK 4.2
Fitbit OS 4.2   - x.71.6.19 2020-09-10







SDK 4.2.1
Fitbit OS 4.2.2   - x.71.6.  







SDK 4.2.2
Fitbit OS 4.2.2   - x.71.6.  







SDK 4.3
Fitbit OS 4.2.2   - x.72.1.15 2021-07-20







SDK 4.3. 1
Fitbit OS 4.3.1   - x.72.1. 2021-07-20







SDK 5.0
Fitbit OS 5.0   - x.128.1.42 2020-09-24







SDK 5.1
Fitbit OS 5.1   - x.128.4.15








SDK 5.1.1
Fitbit OS 5.1.1 - x.128.4.17








SDK 6.0
Fitbit OS 5.2   - x.128.5.38 2021-07-20







SDK 6.0
Fitbit OS 5.2.1   - x.128.5. 2021-07-20







SDK 6.1
Fitbit OS 5.3   - x.128.6.12 2022-03-29