Rank history
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15C Pro Scientific Calculator by Vicinno Soft LLC currently holds steady positions in two App Store markets, sitting at #33 on Cape Verde's Top Paid chart and #85 on Venezuela's Top Paid chart, with zero movement in recent updates. The app reached its all-time peak of #28 on July 30, 2026, and over the last 30 days has held a best rank of #30 with an average of #32, indicating it remains very close to its highest-ever position. The Cape Verde ranking has essentially plateaued at #33, suggesting a stable, mature performance with no significant decline from the recent peak. Overall, the trajectory is flat-to-slightly-cooling, with the app trading just a few places below its best-ever result rather than experiencing any meaningful climb or drop.