Custom Notes Shopify Apps – Analytics & Insights

RA Term and Condition Checkbox ranks #1 for custom notes with 16.6% share — the leader position in a fragmented field where many apps are within striking distance, 9.3pp ahead of Mini:Custom Fields Personalize (7.3%). Amp Slide Cart Upsell Drawer sits at #3 with 32.1% share, rounding out the top tier. The top 3 apps together control 56.0% of custom notes installs — a clear leadership tier with a meaningful long tail behind them. RA Term and Condition Checkbox is the standout mover this month, climbing 2 positions — a momentum signal worth tracking. Worth noting: the top-ranked app and the highest-share app aren't the same here — App Store rank and our market share metric (computed from review counts and other factors) move on independent dynamics, so cross-checking both views matters in this category.

Custom Notes is a fragmented market — the top 3 apps together hold only 56.0% of installs, leaving RA Term and Condition Checkbox's 16.6% lead modest in absolute terms and Amp Slide Cart Upsell Drawer at 32.1% still capturing meaningful share. With this many viable apps, pricing model and integration depth differentiate custom notes options more than rank does.

RA Term and Condition Checkbox climbed from #3 (May 2026) to #1 (Sep 2026) — a 2-position gain among custom notes apps over the charted window. Across the top 5 plotted custom notes apps, 4 improved their ranking while 1 declined — the category is moving upward overall. RA Term and Condition Checkbox's share expanded +15.3pp from 1.2% (May 2026) to 16.6% (Sep 2026) — a sustained widening of the gap against other custom notes apps over this window.

A 2-position move for the leader over the charted custom notes window is large enough to reflect real merchant adoption shifts, not just App Store noise — RA Term and Condition Checkbox's climb as of Sep 2026 is the strongest trajectory signal in this chart.

United States leads geographic demand for custom notes apps at 28.8%, but the install base is meaningfully spread across multiple top markets. Netherlands follows at 11.1%, with Australia at 6.5%. Together, the top 3 markets account for 46.4% of custom notes app installs worldwide. United Kingdom (5.4%) and Canada (5.2%) round out the top 5. Netherlands is the fastest-growing market this month (+5.9pp), pointing to accelerating demand outside the established leaders.

custom notes app demand is split between United States (28.8%), Netherlands (11.1%), and Australia (6.5%) — the leaders in moderately distributed categories like this usually invest in multi-currency, multi-language support, making them workable for cross-border custom notes merchants.

None of the top 5 custom notes apps tracked here have yet crossed 1,000 reviews. AOV.ai Cart Drawer Cart Upsell leads the set on current cumulative reviews with 802 — closest to the milestone, at roughly 80% of the way there.

With no app in this custom notes set having crossed 1,000 reviews, the category is still in early adoption. AOV.ai Cart Drawer Cart Upsell is the closest to breaking out at 802 cumulative reviews — worth tracking its per-month review velocity to see whether it's on pace to cross the milestone first.