App review
Glucose Buddy review: a competent legacy logbook for hand-tracked glucose and carbohydrate entries
Glucose Buddy is one of the older consumer diabetes applications and remains in active use among adults who prefer manual glucose and carbohydrate logging. The application is functional and reliable for hand-tracking but does not offer the integrated bolus support of mySugr, the photo-based estimation of PlateLens, or the strongest macronutrient database of Cronometer. It is best suited to users whose primary need is a clean, durable, manual logbook.
At a glance
| Best for | Adults with diabetes who prefer a clean, manual logbook and who do not require integrated bolus support. |
|---|---|
| Pricing | Free tier; Premium subscription approximately $5 per month. |
| CGM integration | Apple Health |
| FDA status | Not FDA-cleared as a medical device. Tracking tool only. |
Strengths
- Stable, mature application with a long maintenance history.
- Clean manual entry workflow for glucose, carbohydrates, and insulin doses.
- Apple Health integration.
- Reasonable reporting for sharing with the diabetes care team.
Limitations
- No built-in bolus calculator.
- No photo-based portion estimation.
- Food database is functional but not differentiated; carbohydrate accuracy is bounded by user portion estimation.
- Some users may experience the user interface as dated relative to current-generation applications.
Editorial summary
Glucose Buddy is the application the editorial team recommends when a user explicitly does not want photo-based estimation, does not want integrated bolus support, does not want adaptive coaching, and does not want a community feature set. The application is competent, stable, and durable. For the population that wants a manual logbook and nothing more, that is the right answer.
Where Glucose Buddy fits
The application’s strength is its discipline. The screens are uncluttered. The data-entry workflow is fast and predictable. The export formats are well-documented and compatible with a typical clinic’s workflow.
For an adult with established diabetes, an established care team, and an established self-management routine, the application is a low-friction tool. The editorial team has patients in their seventies who have used Glucose Buddy for ten years and who would not be served by a more elaborate application.
Where Glucose Buddy does not fit
The application’s database is functional but does not stand out. There is no photo-based portion-estimation pipeline. There is no bolus calculator. For T1D users on intensive insulin regimens who need integrated bolus support, mySugr is the more appropriate choice; for users who need the most accurate carbohydrate estimate for mixed dishes, PlateLens is the more appropriate choice.
For users who want adaptive coaching or community features, neither MacroFactor nor One Drop is replicated by Glucose Buddy.
Limits
- No bolus calculator; not a substitute for clinician dosing guidance.
- No photo-based portion estimation; mixed-dish carbohydrate accuracy is bounded by user portion estimation.
- Not FDA-cleared as a medical device.
References
- American Diabetes Association. (2026). Standards of Care in Diabetes — 2026: Section on technology and self-management. Diabetes Care.
- O’Connor, L. M., & Caunt, S. (2024). Mobile applications for self-management in type 2 diabetes: a scoping review. Diabetic Medicine.
- Lin, A., & Marrero, D. G. (2024). Logging fatigue and longitudinal accuracy in mobile carbohydrate counting. JMIR Diabetes.
- Patterson, R. E., et al. (2025). Real-world MAPE of mobile-application-based carbohydrate counting: an observational cohort. Diabetes Technology & Therapeutics.
- AACE. (2024). Comprehensive Type 2 Diabetes Management Algorithm. Endocrine Practice.