Identify the historical app
A 2009 Macworld first-aid app roundup identifies CPR Buddy from Divide by Zero. That source establishes the old product’s context; it is not a current clinical recommendation. Newer products with similar names should not be assumed to share its developer or guidance.
Do not use a historical review as instructions
This page deliberately provides no CPR procedure, compression timing, or emergency sequence. In an emergency, contact local emergency services and follow the dispatcher’s instructions. An old article should never delay that contact or be treated as evidence that a legacy app remains suitable.
The historical date matters. Medical guidance, software behavior, and device capabilities can change. A review describing what a tool did years ago cannot validate how it performs on a current phone.
Evaluate the source of any training material
For non-emergency preparation, look for a recognized training provider, a clearly identified intended audience, and an explicit revision date. A professional reference and material intended for the general public are not automatically interchangeable. Check whether an app explains who reviewed its content and how corrections are handled.
Screenshots and a reassuring product name are insufficient evidence of clinical quality. Treat claims of readiness or effectiveness as claims that require appropriate support, not as features confirmed by a store listing.
Preserve history without reviving old advice
The useful archival work is to record the publisher, release period, and type of software, while separating those facts from present-day guidance. This page does not offer a legacy download or a replacement medical app recommendation.
If the original article text is recovered, any outdated procedural material should be clearly contextualized rather than silently republished as advice for an emergency.